bael-4197: indent with spaces instead of tab

spring-boot-modules/spring-boot-testing/src/main/java/com/baeldung/xmlapplicationcontext/XmlBeanApplication.java

@@ -9,7 +9,7 @@ import org.springframework.context.annotation.ImportResource;
 public class XmlBeanApplication {
 
 	public static void main(String[] args) {
-		SpringApplication.run(XmlBeanApplication.class, args);
+        SpringApplication.run(XmlBeanApplication.class, args);
 	}
 
 }