diff --git a/shallow-deep-copy/pom.xml b/shallow-deep-copy/pom.xml
index 01c1430f28..323f720df3 100644
--- a/shallow-deep-copy/pom.xml
+++ b/shallow-deep-copy/pom.xml
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-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>
-    <artifactId>shallow-deep-copy</artifactId>
-    <name>shallow-deep-copy</name>
-    <packaging>jar</packaging>
+	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>
+	<artifactId>shallow-deep-copy</artifactId>
+	<name>shallow-deep-copy</name>
+	<packaging>jar</packaging>
 
-    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-modules</artifactId>
-        <version>1.0.0-SNAPSHOT</version>
-    </parent>
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parent-modules</artifactId>
+		<version>1.0.0-SNAPSHOT</version>
+	</parent>
 
 </project>
\ No newline at end of file
diff --git a/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Dependency.java b/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Dependency.java
index a5da5fc163..2550acd268 100644
--- a/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Dependency.java
+++ b/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Dependency.java
@@ -1,23 +1,23 @@
 package com.baeldung.shallowdeepcopy;
 
 public class Dependency implements Cloneable {
-	private int value = 13;
-	
-	public Dependency(int value) {
-		super();
-		this.value = value;
-	}
+    private int value = 13;
 
-	public int getValue() {
-		return value;
-	}
+    public Dependency(int value) {
+        super();
+        this.value = value;
+    }
 
-	public void setValue(int value) {
-		this.value = value;
-	}
+    public int getValue() {
+        return value;
+    }
 
-	@Override
-	protected Object clone() throws CloneNotSupportedException {
-		return super.clone();
-	}
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    @Override
+    protected Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
 }
diff --git a/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Main.java b/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Main.java
index fb24007162..33d565bb10 100644
--- a/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Main.java
+++ b/shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Main.java
@@ -1,31 +1,31 @@
 package com.baeldung.shallowdeepcopy;
 
 public class Main implements Cloneable {
-	private Dependency dependency;
-	 	
-	public Main(Dependency dependency) {
-		super();
-		this.dependency = dependency;
-	}
+    private Dependency dependency;
 
-	@Override
-	public Object clone() throws CloneNotSupportedException {
-		return super.clone();
-	}
+    public Main(Dependency dependency) {
+        super();
+        this.dependency = dependency;
+    }
 
-	public Object deepClone() throws CloneNotSupportedException {
-		Main dependentClone = (Main) super.clone();
-		Dependency dependencyClone = (Dependency) this.dependency.clone();
-		dependentClone.setDependency(dependencyClone);
-		return dependentClone;
-	}
-	
-	public Dependency getDependency() {
-		return dependency;
-	}
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+
+    public Object deepClone() throws CloneNotSupportedException {
+        Main dependentClone = (Main) super.clone();
+        Dependency dependencyClone = (Dependency) this.dependency.clone();
+        dependentClone.setDependency(dependencyClone);
+        return dependentClone;
+    }
+
+    public Dependency getDependency() {
+        return dependency;
+    }
+
+    public void setDependency(Dependency dependency) {
+        this.dependency = dependency;
+    }
 
-	public void setDependency(Dependency dependency) {
-		this.dependency = dependency;
-	}
-	
 }
diff --git a/shallow-deep-copy/src/main/resources/logback.xml b/shallow-deep-copy/src/main/resources/logback.xml
index 7d900d8ea8..830ab22727 100644
--- a/shallow-deep-copy/src/main/resources/logback.xml
+++ b/shallow-deep-copy/src/main/resources/logback.xml
@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
-    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
-            </pattern>
-        </encoder>
-    </appender>
+	<appender name="STDOUT"
+		class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+			</pattern>
+		</encoder>
+	</appender>
 
-    <root level="INFO">
-        <appender-ref ref="STDOUT" />
-    </root>
+	<root level="INFO">
+		<appender-ref ref="STDOUT" />
+	</root>
 </configuration>
\ No newline at end of file
diff --git a/shallow-deep-copy/src/test/java/com/baeldung/shallowdeepcopy/ShallowDeepCopyUnitTest.java b/shallow-deep-copy/src/test/java/com/baeldung/shallowdeepcopy/ShallowDeepCopyUnitTest.java
index 321c2df327..f75bbc040b 100644
--- a/shallow-deep-copy/src/test/java/com/baeldung/shallowdeepcopy/ShallowDeepCopyUnitTest.java
+++ b/shallow-deep-copy/src/test/java/com/baeldung/shallowdeepcopy/ShallowDeepCopyUnitTest.java
@@ -5,23 +5,24 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.junit.jupiter.api.Test;
 
 class ShallowDeepCopyUnitTest {
-		
-	@Test
-	public void givenAnObjectAndADependency_whenShallowClonedAndDepencyChanges_ThenDepencyHasNewValue() throws Exception {
-		Dependency dependency = new Dependency(13);
-		Main main =  new Main(dependency);
-		Main shallowClone = (Main) main.clone();
-		dependency.setValue(17);
-		assertEquals(17, shallowClone.getDependency().getValue());
-	}
 
-	
-	@Test
-	public void givenAnObjectAndADependency_whenDeepClonedAndDepencyChanges_ThenDepencyKeepsOldValue() throws Exception {
-		Dependency dependency = new Dependency(13);
-		Main main =  new Main(dependency);
-		Main deepClone = (Main) main.deepClone();
-		dependency.setValue(17);
-		assertEquals(13, deepClone.getDependency().getValue());
-	}
+    @Test
+    public void givenAnObjectAndADependency_whenShallowClonedAndDepencyChanges_ThenDepencyHasNewValue() throws Exception {
+        Dependency dependency = new Dependency(13);
+        Main main = new Main(dependency);
+        Main shallowClone = (Main) main.clone();
+        dependency.setValue(17);
+        assertEquals(17, shallowClone.getDependency()
+            .getValue());
+    }
+
+    @Test
+    public void givenAnObjectAndADependency_whenDeepClonedAndDepencyChanges_ThenDepencyKeepsOldValue() throws Exception {
+        Dependency dependency = new Dependency(13);
+        Main main = new Main(dependency);
+        Main deepClone = (Main) main.deepClone();
+        dependency.setValue(17);
+        assertEquals(13, deepClone.getDependency()
+            .getValue());
+    }
 }