Fix indentation of Kotlin datamapping examples (#5563)

* Add Kotlin data mapping examples (BAEL-2247)

* Fix indentation in Kotlin datamapping examples

core-kotlin/src/main/kotlin/com/baeldung/datamapping/User.kt

@@ -1,10 +1,10 @@
 package com.baeldung.datamapping
 
 data class User(
-        val firstName: String,
-        val lastName: String,
-        val street: String,
-        val houseNumber: String,
-        val phone: String,
-        val age: Int,
-        val password: String)
+  val firstName: String,
+  val lastName: String,
+  val street: String,
+  val houseNumber: String,
+  val phone: String,
+  val age: Int,
+  val password: String)

core-kotlin/src/main/kotlin/com/baeldung/datamapping/UserExtensions.kt

@@ -3,10 +3,10 @@ package com.baeldung.datamapping
 import kotlin.reflect.full.memberProperties
 
 fun User.toUserView() = UserView(
-        name = "$firstName $lastName",
-        address = "$street $houseNumber",
-        telephone = phone,
-        age = age
+  name = "$firstName $lastName",
+  address = "$street $houseNumber",
+  telephone = phone,
+  age = age
 )
 
 fun User.toUserViewReflection() = with(::UserView) {

core-kotlin/src/main/kotlin/com/baeldung/datamapping/UserView.kt

@@ -1,8 +1,8 @@
 package com.baeldung.datamapping
 
 data class UserView(
-        val name: String,
-        val address: String,
-        val telephone: String,
-        val age: Int
+  val name: String,
+  val address: String,
+  val telephone: String,
+  val age: Int
 )