diff --git a/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/DuplicatesCounter.java b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/duplicatescounter/DuplicatesCounter.java
similarity index 96%
rename from core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/DuplicatesCounter.java
rename to core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/duplicatescounter/DuplicatesCounter.java
index 04e24e5fa1..b5138eed7d 100644
--- a/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/DuplicatesCounter.java
+++ b/core-java-modules/core-java-collections-list-3/src/main/java/com/baeldung/list/duplicatescounter/DuplicatesCounter.java
@@ -1,4 +1,4 @@
-package com.baeldung.list;
+package com.baeldung.list.duplicatescounter;
 
 import java.util.HashMap;
 import java.util.List;
diff --git a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/collection/filtering/CollectionFilteringUnitTest.java b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/collection/filtering/CollectionFilteringUnitTest.java
index cbc7136192..d41c12cd23 100644
--- a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/collection/filtering/CollectionFilteringUnitTest.java
+++ b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/collection/filtering/CollectionFilteringUnitTest.java
@@ -33,9 +33,9 @@ public class CollectionFilteringUnitTest {
 
         for (Employee employee : originalList) {
             for (String name : nameFilter) {
-                if (employee.getName()
-                    .equalsIgnoreCase(name)) {
+                if (employee.getName().equals(name)) {
                     filteredList.add(employee);
+                    //break;
                 }
             }
         }
diff --git a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/DuplicatesCounterUnitTest.java b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/duplicatescounter/DuplicatesCounterUnitTest.java
similarity index 97%
rename from core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/DuplicatesCounterUnitTest.java
rename to core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/duplicatescounter/DuplicatesCounterUnitTest.java
index 4b6a03aaef..be9ccded9b 100644
--- a/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/DuplicatesCounterUnitTest.java
+++ b/core-java-modules/core-java-collections-list-3/src/test/java/com/baeldung/list/duplicatescounter/DuplicatesCounterUnitTest.java
@@ -1,4 +1,4 @@
-package com.baeldung.list;
+package com.baeldung.list.duplicatescounter;
 
 import org.assertj.core.util.Lists;
 import org.junit.jupiter.api.Test;
diff --git a/core-java-modules/core-java-io-2/src/test/java/com/baeldung/file/FileClassDemoUnitTest.java b/core-java-modules/core-java-io-2/src/test/java/com/baeldung/file/FileClassDemoUnitTest.java
index b60a12d208..322060fed8 100644
--- a/core-java-modules/core-java-io-2/src/test/java/com/baeldung/file/FileClassDemoUnitTest.java
+++ b/core-java-modules/core-java-io-2/src/test/java/com/baeldung/file/FileClassDemoUnitTest.java
@@ -11,148 +11,171 @@ import static org.junit.Assert.*;
 public class FileClassDemoUnitTest {
 
     @Test
-    public void givenDirectoryCreated_whenMkdirIsInvoked_thenDirectoryIsDeleted() {
-        File directory = new File("testDirectory");
-        if (!directory.isDirectory() || !directory.exists()) {
-            directory.mkdir();
-        }
-
+    public void givenDir_whenMkdir_thenDirIsDeleted() {
+        File directory = new File("dir");
+        assertTrue(directory.mkdir());
         assertTrue(directory.delete());
     }
 
     @Test
-    public void givenFileCreated_whenCreateNewFileIsInvoked_thenFileIsDeleted() throws IOException {
-        File file = new File("testFile.txt");
-        if (!file.isFile() || !file.exists()) {
-            file.createNewFile();
+    public void givenFile_whenCreateNewFile_thenFileIsDeleted() {
+        File file = new File("file.txt");
+        try {
+            assertTrue(file.createNewFile());
+        } catch (IOException e) {
+            fail("Could not create " + "file.txt");
         }
-
         assertTrue(file.delete());
     }
 
+    @Test
+    public void givenFile_whenCreateNewFile_thenMetadataIsCorrect() {
+
+        String sep = File.separator;
+
+        File parentDir = makeDir("filesDir");
+
+        File child = new File(parentDir, "file.txt");
+        try {
+            child.createNewFile();
+        } catch (IOException e) {
+            fail("Could not create " + "file.txt");
+        }
+
+        assertEquals("file.txt", child.getName());
+        assertEquals(parentDir.getName(), child.getParentFile().getName());
+        assertEquals(parentDir.getPath() + sep + "file.txt", child.getPath());
+
+        removeDir(parentDir);
+    }
+
 
     @Test
-    public void givenFileCreated_whenCreateNewFileInvoked_thenMetadataIsAsExpected() throws IOException {
+    public void givenReadOnlyFile_whenCreateNewFile_thenCantModFile() {
+        File parentDir = makeDir("readDir");
 
-        // different Operating systems have different separator characters
-        String separatorCharacter = System.getProperty("file.separator");
-
-        File parentDirectory = makeDirectory("filesDirectory");
-
-        File childFile = new File(parentDirectory, "file1.txt");
-        childFile.createNewFile();
-
-        assertTrue(childFile.getName().equals("file1.txt"));
-        assertTrue(childFile.getParentFile().getName().equals(parentDirectory.getName()));
-        assertTrue(childFile.getPath().equals(parentDirectory.getPath() + separatorCharacter + "file1.txt"));
-
-        removeDirectory(parentDirectory);
-    }
-
-
-    @Test(expected = FileNotFoundException.class)
-    public void givenReadOnlyFileCreated_whenCreateNewFileInvoked_thenFileCannotBeWrittenTo() throws IOException {
-        File parentDirectory = makeDirectory("filesDirectory");
-
-        File childFile = new File(parentDirectory, "file1.txt");
-        childFile.createNewFile();
-
-        childFile.setWritable(false);
-
-        FileOutputStream fos = new FileOutputStream(childFile);
-        fos.write("Hello World".getBytes()); // write operation
-        fos.flush();
-        fos.close();
-
-        removeDirectory(parentDirectory);
-    }
-
-    @Test(expected = FileNotFoundException.class)
-    public void givenWriteOnlyFileCreated_whenCreateNewFileInvoked_thenFileCannotBeReadFrom() throws IOException {
-        File parentDirectory = makeDirectory("filesDirectory");
-
-        File childFile = new File(parentDirectory, "file1.txt");
-        childFile.createNewFile();
-
-        childFile.setReadable(false);
-
-        FileInputStream fis = new FileInputStream(childFile);
-        fis.read(); // read operation
-        fis.close();
-
-        removeDirectory(parentDirectory);
+        File child = new File(parentDir, "file.txt");
+        try {
+            child.createNewFile();
+        } catch (IOException e) {
+            fail("Could not create " + "file.txt");
+        }
+        child.setWritable(false);
+        boolean writable = true;
+        try (FileOutputStream fos = new FileOutputStream(child)) {
+            fos.write("Hello World".getBytes()); // write operation
+            fos.flush();
+        } catch (IOException e) {
+            writable = false;
+        } finally {
+            removeDir(parentDir);
+        }
+        assertFalse(writable);
     }
 
     @Test
-    public void givenFilesCreatedInDirectory_whenCreateNewFileInvoked_thenTheyCanBeListedAsExpected() throws IOException {
-        File directory = makeDirectory("filtersDirectory");
+    public void givenWriteOnlyFile_whenCreateNewFile_thenCantReadFile() {
+        File parentDir = makeDir("writeDir");
 
-        File csvFile = new File(directory, "csvFile.csv");
-        csvFile.createNewFile();
+        File child = new File(parentDir, "file.txt");
+        try {
+            child.createNewFile();
+        } catch (IOException e) {
+            fail("Could not create " + "file.txt");
+        }
+        child.setReadable(false);
+        boolean readable = true;
+        try (FileInputStream fis = new FileInputStream(child)) {
+            fis.read(); // read operation
+        } catch (IOException e) {
+            readable = false;
+        } finally {
+            removeDir(parentDir);
+        }
+        assertFalse(readable);
+    }
 
-        File txtFile = new File(directory, "txtFile.txt");
-        txtFile.createNewFile();
+    @Test
+    public void givenFilesInDir_whenCreateNewFile_thenCanListFiles() {
+        File parentDir = makeDir("filtersDir");
+
+        String[] files = {"file1.csv", "file2.txt"};
+        for (String file : files) {
+            try {
+                new File(parentDir, file).createNewFile();
+            } catch (IOException e) {
+                fail("Could not create " + file);
+            }
+        }
 
         //normal listing
-        assertEquals(2, directory.list().length);
+        assertEquals(2, parentDir.list().length);
 
         //filtered listing
         FilenameFilter csvFilter = (dir, ext) -> ext.endsWith(".csv");
-        assertEquals(1, directory.list(csvFilter).length);
+        assertEquals(1, parentDir.list(csvFilter).length);
 
-        removeDirectory(directory);
+        removeDir(parentDir);
     }
 
     @Test
-    public void givenDirectoryIsCreated_whenMkdirInvoked_thenDirectoryCanBeRenamed() {
+    public void givenDir_whenMkdir_thenCanRenameDir() {
 
-        File source = makeDirectory("source");
-        File destination = makeDirectory("destination");
-        source.renameTo(destination);
+        File source = makeDir("source");
+        File destination = makeDir("destination");
+        boolean renamed = source.renameTo(destination);
 
-        assertFalse(source.isDirectory());
-        assertTrue(destination.isDirectory());
+        if (renamed) {
+            assertFalse(source.isDirectory());
+            assertTrue(destination.isDirectory());
 
-        removeDirectory(destination);
+            removeDir(destination);
+        }
     }
 
     @Test
-    public void givenDataIsWrittenToFile_whenWriteIsInvoked_thenFreeSpaceOnSystemDecreases() throws IOException {
+    public void givenDataWritten_whenWrite_thenFreeSpaceReduces() {
 
-        String name = System.getProperty("user.home") + System.getProperty("file.separator") + "test";
-        File testDir = makeDirectory(name);
+        String home = System.getProperty("user.home");
+        String sep = File.separator;
+        File testDir = makeDir(home + sep + "test");
         File sample = new File(testDir, "sample.txt");
 
-        long freeSpaceBeforeWrite = testDir.getFreeSpace();
-        writeSampleDataToFile(sample);
+        long freeSpaceBefore = testDir.getFreeSpace();
+        try {
+            writeSampleDataToFile(sample);
+        } catch (IOException e) {
+            fail("Could not write to " + "sample.txt");
+        }
 
-        long freeSpaceAfterWrite = testDir.getFreeSpace();
-        assertTrue(freeSpaceAfterWrite < freeSpaceBeforeWrite);
+        long freeSpaceAfter = testDir.getFreeSpace();
+        assertTrue(freeSpaceAfter < freeSpaceBefore);
 
-        removeDirectory(testDir);
+        removeDir(testDir);
     }
 
-    private static File makeDirectory(String directoryName) {
-        File directory = new File(directoryName);
+    private static File makeDir(String name) {
+        File directory = new File(name);
         directory.mkdir();
         if (directory.isDirectory()) {
             return directory;
         }
-        throw new RuntimeException("Directory not created for " + directoryName);
+        throw new RuntimeException("'" + name + "' not made!");
     }
 
-    private static void removeDirectory(File directory) {
+    private static void removeDir(File directory) {
         // make sure you don't delete your home directory here
-        if (directory.getPath().equals(System.getProperty("user.home"))) {
+        String home = System.getProperty("user.home");
+        if (directory.getPath().equals(home)) {
             return;
         }
 
         // remove directory and its files from system
-        if (directory != null && directory.exists()) {
+        if (directory.exists()) {
             // delete all files inside the directory
-            File[] filesInDirectory = directory.listFiles();
-            if (filesInDirectory != null) {
-                List<File> files = Arrays.asList(filesInDirectory);
+            File[] dirFiles = directory.listFiles();
+            if (dirFiles != null) {
+                List<File> files = Arrays.asList(dirFiles);
                 files.forEach(f -> deleteFile(f));
             }
 
@@ -171,8 +194,8 @@ public class FileClassDemoUnitTest {
         //write sample text to file
         try (FileOutputStream out = new FileOutputStream(sample)) {
             for (int i = 1; i <= 100000; i++) {
-                String sampleText = "Sample line number " + i + "\n";
-                out.write(sampleText.getBytes());
+                String text = "Sample line number " + i + "\n";
+                out.write(text.getBytes());
             }
         }
     }
diff --git a/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/Circle.java b/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/Circle.java
new file mode 100644
index 0000000000..a1f08d1bff
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/Circle.java
@@ -0,0 +1,5 @@
+package com.baeldung.strictfpUsage;
+
+public strictfp interface Circle {
+    double computeArea(double radius);
+}
diff --git a/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/ScientificCalculator.java b/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/ScientificCalculator.java
new file mode 100644
index 0000000000..b898c3da3e
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-4/src/main/java/com/baeldung/strictfpUsage/ScientificCalculator.java
@@ -0,0 +1,12 @@
+package com.baeldung.strictfpUsage;
+
+public strictfp class ScientificCalculator {
+
+    public double sum(double value1, double value2) {
+        return value1 + value2;
+    }
+
+    public double diff(double value1, double value2) {
+        return value1 - value2;
+    }
+}
diff --git a/core-java-modules/core-java-lang-oop-4/src/test/java/com/baeldung/strictfpUsage/ScientificCalculatorUnitTest.java b/core-java-modules/core-java-lang-oop-4/src/test/java/com/baeldung/strictfpUsage/ScientificCalculatorUnitTest.java
new file mode 100644
index 0000000000..775c75ca9d
--- /dev/null
+++ b/core-java-modules/core-java-lang-oop-4/src/test/java/com/baeldung/strictfpUsage/ScientificCalculatorUnitTest.java
@@ -0,0 +1,18 @@
+package com.baeldung.strictfpUsage;
+
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+public class ScientificCalculatorUnitTest {
+
+    @Test
+    public void whenMethodOfstrictfpClassInvoked_thenIdenticalResultOnAllPlatforms() {
+        ScientificCalculator calculator = new ScientificCalculator();
+        double result = calculator.sum(23e10, 98e17);
+        assertThat(result, is(9.800000230000001E18));
+        result = calculator.diff(Double.MAX_VALUE, 1.56);
+        assertThat(result, is(1.7976931348623157E308));
+    }
+}
diff --git a/core-java-modules/core-java-nio/README.md b/core-java-modules/core-java-nio/README.md
index f37c8a3d38..b64a436957 100644
--- a/core-java-modules/core-java-nio/README.md
+++ b/core-java-modules/core-java-nio/README.md
@@ -14,4 +14,4 @@ This module contains articles about core Java non-blocking input and output (IO)
 - [Java NIO2 Path API](https://www.baeldung.com/java-nio-2-path)
 - [Guide to Java NIO2 Asynchronous Channel APIs](https://www.baeldung.com/java-nio-2-async-channels)
 - [A Guide to NIO2 Asynchronous Socket Channel](https://www.baeldung.com/java-nio2-async-socket-channel)
-- [[More -->]](/core-java-modules/core-java-nio-2)
\ No newline at end of file
+- [[More -->]](/core-java-modules/core-java-nio-2)
diff --git a/core-java-modules/core-java-streams-3/src/main/java/com/baeldung/streams/debug/entity/Customer.java b/core-java-modules/core-java-streams-3/src/main/java/com/baeldung/streams/debug/entity/Customer.java
new file mode 100644
index 0000000000..b8e1b6db5b
--- /dev/null
+++ b/core-java-modules/core-java-streams-3/src/main/java/com/baeldung/streams/debug/entity/Customer.java
@@ -0,0 +1,19 @@
+package com.baeldung.streams.debug.entity;
+
+public class Customer {
+    private final String name;
+    private final int age;
+
+    public Customer(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}
diff --git a/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example1.java b/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example1.java
new file mode 100644
index 0000000000..d8087bc98a
--- /dev/null
+++ b/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example1.java
@@ -0,0 +1,18 @@
+package com.baeldung.streams.debug;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.stream.IntStream;
+
+import org.junit.Test;
+
+public class Example1 {
+    @Test
+    public void whenDebugging_thenInformationIsShown() {
+        int[] listOutputSorted = IntStream.of(-3, 10, -4, 1, 3)
+            .sorted()
+            .toArray();
+
+        assertThat(listOutputSorted).isSorted();
+    }
+}
diff --git a/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example2.java b/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example2.java
new file mode 100644
index 0000000000..56cbddf0b4
--- /dev/null
+++ b/core-java-modules/core-java-streams-3/src/test/java/com/baeldung/streams/debug/Example2.java
@@ -0,0 +1,36 @@
+package com.baeldung.streams.debug;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Stream;
+
+import org.junit.Test;
+
+import com.baeldung.streams.debug.entity.Customer;
+
+public class Example2 {
+    @Test
+    public void whenDebugging_thenInformationIsShown() {
+        List<Optional<Customer>> customers = Arrays.asList(
+            Optional.of(new Customer("John P.", 15)),
+            Optional.of(new Customer("Sarah M.", 78)),
+            Optional.empty(),
+            Optional.of(new Customer("Mary T.", 20)),
+            Optional.empty(),
+            Optional.of(new Customer("Florian G.", 89)),
+            Optional.empty()
+        );
+
+        long numberOf65PlusCustomers = customers.stream()
+            .flatMap(c -> c.map(Stream::of)
+              .orElseGet(Stream::empty))
+            .mapToInt(Customer::getAge)
+            .filter(c -> c > 65)
+            .count();
+
+        assertThat(numberOf65PlusCustomers).isEqualTo(2);
+    }
+}
diff --git a/core-java-modules/core-java-string-algorithms-2/README.md b/core-java-modules/core-java-string-algorithms-2/README.md
index 2cd64e1920..94ace77d66 100644
--- a/core-java-modules/core-java-string-algorithms-2/README.md
+++ b/core-java-modules/core-java-string-algorithms-2/README.md
@@ -12,5 +12,5 @@ This module contains articles about string-related algorithms.
 - [Pad a String with Zeros or Spaces in Java](https://www.baeldung.com/java-pad-string)
 - [Remove Leading and Trailing Characters from a String](https://www.baeldung.com/java-remove-trailing-characters)
 - [Counting Words in a String](https://www.baeldung.com/java-word-counting)
-- [Finding the Difference Between Two Strings](https://www.baeldung.com/java-difference-between-two-strings)
+- [Finding the Difference Between Two Strings in Java](https://www.baeldung.com/java-difference-between-two-strings)
 - More articles: [[<-- prev]](../core-java-string-algorithms)
diff --git a/httpclient/README.md b/httpclient/README.md
index 678b195965..d88739e901 100644
--- a/httpclient/README.md
+++ b/httpclient/README.md
@@ -2,7 +2,7 @@
 
 This module contains articles about HttpClient 4.x
 
-###The Course
+### The Course
 
 The "REST With Spring" Classes: http://bit.ly/restwithspring
 
diff --git a/jackson/README.md b/jackson/README.md
index f96a569617..a62a788c41 100644
--- a/jackson/README.md
+++ b/jackson/README.md
@@ -2,10 +2,12 @@
 
 This module contains articles about Jackson.
 
-###The Course
+### The Course
+
 The "REST With Spring" Classes: http://bit.ly/restwithspring
 
 ### Relevant Articles: 
+
 - [Jackson – Unmarshall to Collection/Array](https://www.baeldung.com/jackson-collection-array)
 - [Jackson – Custom Serializer](https://www.baeldung.com/jackson-custom-serialization)
 - [Getting Started with Custom Deserialization in Jackson](https://www.baeldung.com/jackson-deserialization)
@@ -24,7 +26,7 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Map Serialization and Deserialization with Jackson](https://www.baeldung.com/jackson-map)
 - [Jackson Streaming API](https://www.baeldung.com/jackson-streaming-api)
 - [Jackson – JsonMappingException (No serializer found for class)](https://www.baeldung.com/jackson-jsonmappingexception)
-- [How To Serialize Enums as JSON Objects with Jackson](https://www.baeldung.com/jackson-serialize-enums)
+- [How To Serialize and Deserialize Enums with Jackson](https://www.baeldung.com/jackson-serialize-enums)
 - [Jackson – Marshall String to JsonNode](https://www.baeldung.com/jackson-json-to-jsonnode)
 - [Jackson – Unmarshall to Collection/Array](https://www.baeldung.com/jackson-collection-array)
 - [Serialize Only Fields that meet a Custom Criteria with Jackson](https://www.baeldung.com/jackson-serialize-field-custom-criteria)
diff --git a/java-jdi/README.md b/java-jdi/README.md
index c8c2d3e9ab..110906e845 100644
--- a/java-jdi/README.md
+++ b/java-jdi/README.md
@@ -2,6 +2,6 @@
 
 This module contains articles about JDI, the Java Debug Interface.
 
-###Relevant articles
+### Relevant articles
 
 - [An Intro to the Java Debug Interface (JDI)](https://www.baeldung.com/java-debug-interface)
diff --git a/linux-bash/command-line-arguments/src/main/bash/userReg-flags.sh b/linux-bash/command-line-arguments/src/main/bash/userReg-flags.sh
new file mode 100644
index 0000000000..b2b4589d03
--- /dev/null
+++ b/linux-bash/command-line-arguments/src/main/bash/userReg-flags.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+while getopts u:a:f: flag
+do
+case "${flag}"
+in
+u) username=${OPTARG};;
+a) age=${OPTARG};;
+f) fullname=${OPTARG};;
+esac
+done
+echo "Username: $username";
+echo "Age: $age";
+echo "Full Name: $fullname";
diff --git a/linux-bash/command-line-arguments/src/main/bash/userReg-positional-parameter.sh b/linux-bash/command-line-arguments/src/main/bash/userReg-positional-parameter.sh
new file mode 100644
index 0000000000..7071ff56d4
--- /dev/null
+++ b/linux-bash/command-line-arguments/src/main/bash/userReg-positional-parameter.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+echo "Username: $1"; 
+echo "Age: $2"; 
+echo "Full Name: $3";
diff --git a/linux-bash/command-line-arguments/src/main/bash/users-loop.sh b/linux-bash/command-line-arguments/src/main/bash/users-loop.sh
new file mode 100644
index 0000000000..545416f3e0
--- /dev/null
+++ b/linux-bash/command-line-arguments/src/main/bash/users-loop.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+i=1;
+for user in "$@"
+do
+echo "Username - $i: $user";
+i=$((i + 1));
+done
diff --git a/linux-bash/command-line-arguments/src/main/bash/users-shift-operator.sh b/linux-bash/command-line-arguments/src/main/bash/users-shift-operator.sh
new file mode 100644
index 0000000000..a212b62317
--- /dev/null
+++ b/linux-bash/command-line-arguments/src/main/bash/users-shift-operator.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+i=1;
+j=$#;
+while [ $i -le $j ]
+do
+echo "Username - $i: $1";
+i=$((i + 1));
+shift 1;
+done
diff --git a/lombok/pom.xml b/lombok/pom.xml
index b67320909e..5e2ad33f66 100644
--- a/lombok/pom.xml
+++ b/lombok/pom.xml
@@ -77,10 +77,11 @@
     <properties>
         <!-- lombok: https://projectlombok.org/changelog.html -->
         <lombok.version>1.18.10</lombok.version>
+
         <!-- various -->
         <hibernate-jpa-2.1-api.version>1.0.0.Final</hibernate-jpa-2.1-api.version>
         <!-- delombok maven plugin -->
-        <delombok-maven-plugin.version>1.18.4.0</delombok-maven-plugin.version>
+        <delombok-maven-plugin.version>1.18.10.0</delombok-maven-plugin.version>
         <assertj-core.version>3.8.0</assertj-core.version>
     </properties>
 
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/BasicAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/BasicAccount.java
index 74ae51c040..a9332735c7 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/BasicAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/BasicAccount.java
@@ -3,8 +3,8 @@ package com.baeldung.lombok.accessors.model;
 import java.math.BigDecimal;
 
 public class BasicAccount {
-    String name;
-    BigDecimal balance;
+    private String name;
+    private BigDecimal balance;
 
     public BigDecimal getBalance() {
         return this.balance;
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedAccount.java
index 8fa9a2e8aa..0437d8f60e 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedAccount.java
@@ -10,6 +10,6 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class ChainedAccount {
-    String name;
-    BigDecimal balance;
+    private String name;
+    private BigDecimal balance;
 }
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedFluentAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedFluentAccount.java
index 22e85848bd..6ebc080c94 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedFluentAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/ChainedFluentAccount.java
@@ -10,6 +10,6 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class ChainedFluentAccount {
-    String name;
-    BigDecimal balance;
+    private String name;
+    private BigDecimal balance;
 }
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/FluentAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/FluentAccount.java
index bc5e6ba70e..4c2e1f7976 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/FluentAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/FluentAccount.java
@@ -10,6 +10,6 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class FluentAccount {
-    String name;
-    BigDecimal balance;
+    private String name;
+    private BigDecimal balance;
 }
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedAccount.java
index e3e3ae620b..506d7adc75 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedAccount.java
@@ -11,6 +11,10 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class PrefixedAccount {
-    String sName;
-    BigDecimal bdBalance;
+    private String sName;
+    private BigDecimal bdBalance;
+
+    @Accessors(prefix = "s_")
+    private String s_notes;
+
 }
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedFluentAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedFluentAccount.java
index 462a9b41ec..eb23bf58e2 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedFluentAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/PrefixedFluentAccount.java
@@ -10,6 +10,6 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class PrefixedFluentAccount {
-    String sName;
-    BigDecimal bdBalance;
+    private String sName;
+    private BigDecimal bdBalance;
 }
diff --git a/lombok/src/main/java/com/baeldung/lombok/accessors/model/StandardAccount.java b/lombok/src/main/java/com/baeldung/lombok/accessors/model/StandardAccount.java
index 89727fef19..4d0d578a4d 100644
--- a/lombok/src/main/java/com/baeldung/lombok/accessors/model/StandardAccount.java
+++ b/lombok/src/main/java/com/baeldung/lombok/accessors/model/StandardAccount.java
@@ -8,6 +8,6 @@ import java.math.BigDecimal;
 @Getter
 @Setter
 public class StandardAccount {
-    String name;
-    BigDecimal balance;
+    private String name;
+    private BigDecimal balance;
 }
diff --git a/lombok/src/test/java/com/baeldung/lombok/accessors/AccessorsUnitTest.java b/lombok/src/test/java/com/baeldung/lombok/accessors/AccessorsUnitTest.java
index 679c7d39ef..04f38bfc32 100644
--- a/lombok/src/test/java/com/baeldung/lombok/accessors/AccessorsUnitTest.java
+++ b/lombok/src/test/java/com/baeldung/lombok/accessors/AccessorsUnitTest.java
@@ -12,11 +12,11 @@ public class AccessorsUnitTest {
     @Test
     public void givenBasicAccount_thenUseBasicAccessors() {
         BasicAccount account = new BasicAccount();
-        account.setBalance(BigDecimal.TEN);
         account.setName("Basic Accessors");
+        account.setBalance(BigDecimal.TEN);
 
-        assertEquals(BigDecimal.TEN, account.getBalance());
         assertEquals("Basic Accessors", account.getName());
+        assertEquals(BigDecimal.TEN, account.getBalance());
     }
 
     @Test
@@ -25,8 +25,8 @@ public class AccessorsUnitTest {
         account.name("Fluent Account");
         account.balance(BigDecimal.TEN);
 
-        assertEquals(BigDecimal.TEN, account.balance());
         assertEquals("Fluent Account", account.name());
+        assertEquals(BigDecimal.TEN, account.balance());
     }
 
     @Test
@@ -34,8 +34,8 @@ public class AccessorsUnitTest {
         ChainedAccount account = new ChainedAccount();
         account.setName("Chained Account").setBalance(BigDecimal.TEN);
 
-        assertEquals(BigDecimal.TEN, account.getBalance());
         assertEquals("Chained Account", account.getName());
+        assertEquals(BigDecimal.TEN, account.getBalance());
     }
 
     @Test
@@ -44,8 +44,8 @@ public class AccessorsUnitTest {
           .name("Fluent Account")
           .balance(BigDecimal.TEN);
 
-        assertEquals(BigDecimal.TEN, account.balance());
         assertEquals("Fluent Account", account.name());
+        assertEquals(BigDecimal.TEN, account.balance());
     }
 
     @Test
@@ -53,9 +53,11 @@ public class AccessorsUnitTest {
         PrefixedAccount account = new PrefixedAccount();
         account.setName("Prefixed Fields");
         account.setBalance(BigDecimal.TEN);
+        account.setNotes("Notes");
 
-        assertEquals(BigDecimal.TEN, account.getBalance());
         assertEquals("Prefixed Fields", account.getName());
+        assertEquals(BigDecimal.TEN, account.getBalance());
+        assertEquals("Notes", account.getNotes());
     }
 
     @Test
@@ -65,8 +67,8 @@ public class AccessorsUnitTest {
           .name("Prefixed Fluent Fields")
           .balance(BigDecimal.TEN);
 
-        assertEquals(BigDecimal.TEN, account.balance());
         assertEquals("Prefixed Fluent Fields", account.name());
+        assertEquals(BigDecimal.TEN, account.balance());
     }
 
 }
diff --git a/mapstruct/README.md b/mapstruct/README.md
index f5a1e1a092..9887a7f43d 100644
--- a/mapstruct/README.md
+++ b/mapstruct/README.md
@@ -2,7 +2,8 @@
 
 This module contains articles about MapStruct.
 
-###Relevant Articles:
+### Relevant Articles:
+
 - [Quick Guide to MapStruct](https://www.baeldung.com/mapstruct)
 - [Custom Mapper with MapStruct](https://www.baeldung.com/mapstruct-custom-mapper)
 - [Using Multiple Source Objects with MapStruct](https://www.baeldung.com/mapstruct-multiple-source-objects)
diff --git a/persistence-modules/hibernate5-2/README.md b/persistence-modules/hibernate5-2/README.md
new file mode 100644
index 0000000000..c61552f305
--- /dev/null
+++ b/persistence-modules/hibernate5-2/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+- [Hibernate Error “Not all named parameters have been set”](https://www.baeldung.com/hibernate-error-named-parameters-not-set)
+
diff --git a/persistence-modules/spring-data-cassandra-reactive/README.md b/persistence-modules/spring-data-cassandra-reactive/README.md
index 87a61d46b3..5352843850 100644
--- a/persistence-modules/spring-data-cassandra-reactive/README.md
+++ b/persistence-modules/spring-data-cassandra-reactive/README.md
@@ -1,3 +1,3 @@
-#Relevant Articles
+### Relevant Articles
 
 - [Spring Data with Reactive Cassandra](https://www.baeldung.com/spring-data-cassandra-reactive)
diff --git a/persistence-modules/spring-data-jpa-3/README.md b/persistence-modules/spring-data-jpa-3/README.md
new file mode 100644
index 0000000000..28e62a9de1
--- /dev/null
+++ b/persistence-modules/spring-data-jpa-3/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+- [Programmatic Transaction Management in Spring](https://www.baeldung.com/spring-programmatic-transaction-management)
+
diff --git a/pom.xml b/pom.xml
index 6f980a893a..c974ba15d9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -610,7 +610,7 @@
 
                 <module>tensorflow-java</module>
                 <module>spf4j</module>
-                <module>spring-boot-configuration</module>
+                <module>spring-boot-config-jpa-error</module>
 				<module>spring-boot-flowable</module>
                 <module>spring-boot-mvc-2</module>
                 <module>spring-boot-performance</module>
@@ -697,7 +697,7 @@
                 <module>spring-boot-bootstrap</module>
                 <module>spring-boot-camel</module>
                 <!-- <module>spring-boot-cli</module> --> <!-- Not a maven project -->
-                <module>spring-boot-configuration</module>
+                <module>spring-boot-config-jpa-error</module>
 				<module>spring-boot-client</module>
 
                 <module>spring-boot-crud</module>
diff --git a/spring-5/README.md b/spring-5/README.md
index 8a0cbe807e..857b199562 100644
--- a/spring-5/README.md
+++ b/spring-5/README.md
@@ -15,4 +15,4 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Spring ResponseStatusException](https://www.baeldung.com/spring-response-status-exception)
 - [Spring Assert Statements](https://www.baeldung.com/spring-assert)
 - [Configuring a Hikari Connection Pool with Spring Boot](https://www.baeldung.com/spring-boot-hikari)
-- [Difference between <context:annotation-config> vs <context:component-scan>](https://www.baeldung.com/spring-contextannotation-contextcomponentscan)
+- [Difference between \<context:annotation-config> vs \<context:component-scan>](https://www.baeldung.com/spring-contextannotation-contextcomponentscan)
diff --git a/spring-boot-configuration/README.md b/spring-boot-config-jpa-error/README.md
similarity index 57%
rename from spring-boot-configuration/README.md
rename to spring-boot-config-jpa-error/README.md
index af634aa5f4..39047a4207 100644
--- a/spring-boot-configuration/README.md
+++ b/spring-boot-config-jpa-error/README.md
@@ -1,6 +1,6 @@
-# Spring Boot Configuration
+# Spring Boot - DataJpaTest Error
 
-This module contains articles about Spring Boot Configuration.
+This module contains examples about a corner case using @DataJpaTest with a multi module project.
 
 ### Relevant Articles: 
 - [Unable to Find @SpringBootConfiguration with @DataJpaTest](https://www.baeldung.com/spring-boot-unable-to-find-springbootconfiguration-with-datajpatest)
diff --git a/spring-boot-configuration/data-jpa-application/pom.xml b/spring-boot-config-jpa-error/data-jpa-application/pom.xml
similarity index 74%
rename from spring-boot-configuration/data-jpa-application/pom.xml
rename to spring-boot-config-jpa-error/data-jpa-application/pom.xml
index b1bf6fda43..2952ff4c4c 100644
--- a/spring-boot-configuration/data-jpa-application/pom.xml
+++ b/spring-boot-config-jpa-error/data-jpa-application/pom.xml
@@ -5,8 +5,8 @@
     <version>0.0.1-SNAPSHOT</version>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-configuration</groupId>
-        <artifactId>spring-boot-configuration</artifactId>
+        <groupId>com.baeldung.spring-boot-config-jpa-error</groupId>
+        <artifactId>spring-boot-config-jpa-error</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 </project>
\ No newline at end of file
diff --git a/spring-boot-configuration/data-jpa-application/src/main/java/com/baeldung/data/jpa/ApplicationFound.java b/spring-boot-config-jpa-error/data-jpa-application/src/main/java/com/baeldung/data/jpa/ApplicationFound.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-application/src/main/java/com/baeldung/data/jpa/ApplicationFound.java
rename to spring-boot-config-jpa-error/data-jpa-application/src/main/java/com/baeldung/data/jpa/ApplicationFound.java
diff --git a/spring-boot-configuration/data-jpa-application/src/main/java/com/baeldung/data/jpa/application/ApplicationNotFound.java b/spring-boot-config-jpa-error/data-jpa-application/src/main/java/com/baeldung/data/jpa/application/ApplicationNotFound.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-application/src/main/java/com/baeldung/data/jpa/application/ApplicationNotFound.java
rename to spring-boot-config-jpa-error/data-jpa-application/src/main/java/com/baeldung/data/jpa/application/ApplicationNotFound.java
diff --git a/spring-boot-configuration/data-jpa-application/src/test/java/com/baeldung/data/jpa/DataJpaUnitTest.java b/spring-boot-config-jpa-error/data-jpa-application/src/test/java/com/baeldung/data/jpa/DataJpaUnitTest.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-application/src/test/java/com/baeldung/data/jpa/DataJpaUnitTest.java
rename to spring-boot-config-jpa-error/data-jpa-application/src/test/java/com/baeldung/data/jpa/DataJpaUnitTest.java
diff --git a/spring-boot-configuration/data-jpa-library/pom.xml b/spring-boot-config-jpa-error/data-jpa-library/pom.xml
similarity index 74%
rename from spring-boot-configuration/data-jpa-library/pom.xml
rename to spring-boot-config-jpa-error/data-jpa-library/pom.xml
index 1534e7ed23..f8b876b65b 100644
--- a/spring-boot-configuration/data-jpa-library/pom.xml
+++ b/spring-boot-config-jpa-error/data-jpa-library/pom.xml
@@ -5,8 +5,8 @@
     <version>0.0.1-SNAPSHOT</version>
 
     <parent>
-        <groupId>com.baeldung.spring-boot-configuration</groupId>
-        <artifactId>spring-boot-configuration</artifactId>
+        <groupId>com.baeldung.spring-boot-config-jpa-error</groupId>
+        <artifactId>spring-boot-config-jpa-error</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 </project>
\ No newline at end of file
diff --git a/spring-boot-configuration/data-jpa-library/src/main/java/com/baeldung/data/jpa/libarary/model/Example.java b/spring-boot-config-jpa-error/data-jpa-library/src/main/java/com/baeldung/data/jpa/libarary/model/Example.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-library/src/main/java/com/baeldung/data/jpa/libarary/model/Example.java
rename to spring-boot-config-jpa-error/data-jpa-library/src/main/java/com/baeldung/data/jpa/libarary/model/Example.java
diff --git a/spring-boot-configuration/data-jpa-library/src/test/java/com/baeldung/data/jpa/TestApplication.java b/spring-boot-config-jpa-error/data-jpa-library/src/test/java/com/baeldung/data/jpa/TestApplication.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-library/src/test/java/com/baeldung/data/jpa/TestApplication.java
rename to spring-boot-config-jpa-error/data-jpa-library/src/test/java/com/baeldung/data/jpa/TestApplication.java
diff --git a/spring-boot-configuration/data-jpa-library/src/test/java/com/baeldung/data/jpa/libarary/DataJpaUnitTest.java b/spring-boot-config-jpa-error/data-jpa-library/src/test/java/com/baeldung/data/jpa/libarary/DataJpaUnitTest.java
similarity index 100%
rename from spring-boot-configuration/data-jpa-library/src/test/java/com/baeldung/data/jpa/libarary/DataJpaUnitTest.java
rename to spring-boot-config-jpa-error/data-jpa-library/src/test/java/com/baeldung/data/jpa/libarary/DataJpaUnitTest.java
diff --git a/spring-boot-configuration/pom.xml b/spring-boot-config-jpa-error/pom.xml
similarity index 93%
rename from spring-boot-configuration/pom.xml
rename to spring-boot-config-jpa-error/pom.xml
index e4473c3f2d..12087aa610 100644
--- a/spring-boot-configuration/pom.xml
+++ b/spring-boot-config-jpa-error/pom.xml
@@ -1,8 +1,8 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung.spring-boot-configuration</groupId>
-    <artifactId>spring-boot-configuration</artifactId>
+    <groupId>com.baeldung.spring-boot-config-jpa-error</groupId>
+    <artifactId>spring-boot-config-jpa-error</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
diff --git a/spring-boot-springdoc/README.md b/spring-boot-springdoc/README.md
new file mode 100644
index 0000000000..e54f4e926f
--- /dev/null
+++ b/spring-boot-springdoc/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+- [Documenting a Spring REST API Using OpenAPI 3.0](https://www.baeldung.com/spring-rest-openapi-documentation)
+
diff --git a/spring-cloud/spring-cloud-stream-starters/README.md b/spring-cloud/spring-cloud-stream-starters/README.md
index 761d54abbd..5b9b70e4f1 100644
--- a/spring-cloud/spring-cloud-stream-starters/README.md
+++ b/spring-cloud/spring-cloud-stream-starters/README.md
@@ -1,3 +1,3 @@
-#Revelant Articles:
+# Relevant Articles:
 
 - [Using a Spring Cloud App Starter](http://www.baeldung.com/spring-cloud-app-starter)
diff --git a/spring-core-3/README.md b/spring-core-3/README.md
index 7ca95ae78e..1c5d911402 100644
--- a/spring-core-3/README.md
+++ b/spring-core-3/README.md
@@ -1,7 +1,7 @@
 ## Relevant Articles:
 
 - [Understanding getBean() in Spring](https://www.baeldung.com/spring-getbean)
-- [Exploring the Spring BeanFactory API](https://www.baeldung.com/spring-beanfactory)
+- [Guide to the Spring BeanFactory](https://www.baeldung.com/spring-beanfactory)
 - [How to use the Spring FactoryBean?](https://www.baeldung.com/spring-factorybean)
 - [Spring – Injecting Collections](https://www.baeldung.com/spring-injecting-collections)
-- More articles: [[<-- prev]](/spring-core-2)
\ No newline at end of file
+- More articles: [[<-- prev]](/spring-core-2)
diff --git a/spring-mvc-xml/README.md b/spring-mvc-xml/README.md
index 44a20e1527..0adf127aaa 100644
--- a/spring-mvc-xml/README.md
+++ b/spring-mvc-xml/README.md
@@ -2,10 +2,12 @@
 
 This module contains articles about Spring MVC with XML configuration
 
-###The Course
+### The Course
+
 The "REST With Spring" Classes: http://bit.ly/restwithspring
 
 ### Relevant Articles: 
+
 - [Java Session Timeout](https://www.baeldung.com/servlet-session-timeout)
 - [Returning Image/Media Data with Spring MVC](https://www.baeldung.com/spring-mvc-image-media-data)
 - [Geolocation by IP in Java](https://www.baeldung.com/geolocation-by-ip-with-maxmind)
@@ -17,4 +19,5 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Debugging the Spring MVC 404 “No mapping found for HTTP request” Error](https://www.baeldung.com/spring-mvc-404-error)
 
 ## Spring MVC with XML Configuration Example Project
+
 - access a sample jsp page at: `http://localhost:8080/spring-mvc-xml/sample.html`
diff --git a/spring-security-mvc-custom/README.md b/spring-security-mvc-custom/README.md
index 1a131f4c23..5eb6169f4b 100644
--- a/spring-security-mvc-custom/README.md
+++ b/spring-security-mvc-custom/README.md
@@ -2,10 +2,12 @@
 
 This module contains articles about Spring Security with custom MVC applications
 
-###The Course
+### The Course
+
 The "REST With Spring" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Articles: 
+
 - [Spring Security Remember Me](https://www.baeldung.com/spring-security-remember-me)
 - [Redirect to different pages after Login with Spring Security](https://www.baeldung.com/spring_redirect_after_login)
 - [Changing Spring Model Parameters with Handler Interceptor](https://www.baeldung.com/spring-model-parameters-with-handler-interceptor)
@@ -15,6 +17,7 @@ The "REST With Spring" Classes: http://github.learnspringsecurity.com
 - [How to Manually Authenticate User with Spring Security](https://www.baeldung.com/manually-set-user-authentication-spring-security)
 
 ### Build the Project
+
 ```
 mvn clean install
 ```
diff --git a/spring-security-mvc-digest-auth/README.md b/spring-security-mvc-digest-auth/README.md
index 0d36dbfd63..be06d63fc4 100644
--- a/spring-security-mvc-digest-auth/README.md
+++ b/spring-security-mvc-digest-auth/README.md
@@ -2,10 +2,12 @@
 
 This module contains articles about digest authentication with Spring Security
 
-###The Course
+### The Course
+
 The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Article: 
+
 - [Spring Security Digest Authentication](https://www.baeldung.com/spring-security-digest-authentication)
 - [RestTemplate with Digest Authentication](https://www.baeldung.com/resttemplate-digest-authentication)
 
diff --git a/spring-security-mvc-ldap/README.md b/spring-security-mvc-ldap/README.md
index 3230c0398a..288791b389 100644
--- a/spring-security-mvc-ldap/README.md
+++ b/spring-security-mvc-ldap/README.md
@@ -2,14 +2,17 @@
 
 This module contains articles about Spring Security LDAP
 
-###The Course
+### The Course
+
 The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Article: 
+
 - [Spring Security – security none, filters none, access permitAll](https://www.baeldung.com/security-none-filters-none-access-permitAll)
 - [Intro to Spring Security LDAP](https://www.baeldung.com/spring-security-ldap)
 
 ### Notes
+
 - the project uses Spring Boot - simply run 'SampleLDAPApplication.java' to start up Spring Boot with a Tomcat container and embedded LDAP server.
 - Once started, open 'http://localhost:8080'
 - This will display the publicly available Home Page
diff --git a/spring-security-mvc-persisted-remember-me/README.md b/spring-security-mvc-persisted-remember-me/README.md
index e3003e89e2..e1208330a3 100644
--- a/spring-security-mvc-persisted-remember-me/README.md
+++ b/spring-security-mvc-persisted-remember-me/README.md
@@ -2,13 +2,16 @@
 
 This module contains articles about 'remember me' with Spring Security
 
-###The Course
+### The Course
+
 The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Articles: 
+
 - [Spring Security – Persistent Remember Me](https://www.baeldung.com/spring-security-persistent-remember-me)
 
 ### Build the Project
+
 ```
 mvn clean install
 ```
diff --git a/spring-security-mvc/README.md b/spring-security-mvc/README.md
index a458127c61..7d1a492cd3 100644
--- a/spring-security-mvc/README.md
+++ b/spring-security-mvc/README.md
@@ -2,15 +2,18 @@
 
 This module contains articles about Spring Security in MVC applications
 
-###The Course
+### The Course
+
 The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Articles: 
+
 - [HttpSessionListener Example – Monitoring](https://www.baeldung.com/httpsessionlistener_with_metrics)
 - [Control the Session with Spring Security](https://www.baeldung.com/spring-security-session)
 
 
 ### Build the Project
+
 ```
 mvn clean install
 ```
diff --git a/spring-security-rest-basic-auth/README.md b/spring-security-rest-basic-auth/README.md
index d12427a106..af6dd598cc 100644
--- a/spring-security-rest-basic-auth/README.md
+++ b/spring-security-rest-basic-auth/README.md
@@ -2,11 +2,12 @@
 
 This module contains articles about basic authentication in RESTful APIs with Spring Security
 
-###The Course
+### The Course
 
 The "Learn Spring Security" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Articles: 
+
 - [Basic Authentication with the RestTemplate](https://www.baeldung.com/how-to-use-resttemplate-with-basic-authentication-in-spring)
 - [A Custom Filter in the Spring Security Filter Chain](https://www.baeldung.com/spring-security-custom-filter)
 - [Spring Security Basic Authentication](https://www.baeldung.com/spring-security-basic-authentication)
diff --git a/spring-security-rest-custom/README.md b/spring-security-rest-custom/README.md
index 15cbc22b5f..be360e035e 100644
--- a/spring-security-rest-custom/README.md
+++ b/spring-security-rest-custom/README.md
@@ -2,10 +2,12 @@
 
 This module contains articles about REST APIs with Spring Security
 
-###The Course
+### The Course
+
 The "REST With Spring" Classes: http://github.learnspringsecurity.com
 
 ### Relevant Articles: 
+
 - [Spring Security Authentication Provider](https://www.baeldung.com/spring-security-authentication-provider)
 - [Retrieve User Information in Spring Security](https://www.baeldung.com/get-user-in-spring-security)
 - [Spring Security – Run-As Authentication](https://www.baeldung.com/spring-security-run-as-auth)
diff --git a/testing-modules/rest-assured/README.md b/testing-modules/rest-assured/README.md
index 0012a63012..96d3c5e353 100644
--- a/testing-modules/rest-assured/README.md
+++ b/testing-modules/rest-assured/README.md
@@ -1,4 +1,5 @@
-###Relevant Articles:
+### Relevant Articles:
+
 - [A Guide to REST-assured](http://www.baeldung.com/rest-assured-tutorial)
 - [REST-assured Support for Spring MockMvc](https://www.baeldung.com/spring-mock-mvc-rest-assured)
 - [Getting and Verifying Response Data with REST-assured](https://www.baeldung.com/rest-assured-response)
diff --git a/testing-modules/rest-testing/README.md b/testing-modules/rest-testing/README.md
index 2d366bd550..27e77e0f51 100644
--- a/testing-modules/rest-testing/README.md
+++ b/testing-modules/rest-testing/README.md
@@ -2,10 +2,12 @@
 
 ## REST Testing and Examples
 
-###The Course
+### The Course
+
 The "REST With Spring" Classes: http://bit.ly/restwithspring
 
 ### Relevant Articles: 
+
 - [Introduction to WireMock](http://www.baeldung.com/introduction-to-wiremock)
 - [Using WireMock Scenarios](https://www.baeldung.com/wiremock-scenarios)
 - [REST API Testing with Cucumber](http://www.baeldung.com/cucumber-rest-api-testing)
diff --git a/testing-modules/xmlunit-2/README.md b/testing-modules/xmlunit-2/README.md
index 72b683796e..55c2c651f2 100644
--- a/testing-modules/xmlunit-2/README.md
+++ b/testing-modules/xmlunit-2/README.md
@@ -1,2 +1,3 @@
-###Relevant Articles:
+### Relevant Articles:
+
 - [Introduction To XMLUnit 2.x](http://www.baeldung.com/xmlunit2)