Use system line separator wherever possible

This closes #424

maven-artifact/src/main/java/org/apache/maven/artifact/resolver/MultipleArtifactsNotFoundException.java

@@ -32,6 +32,8 @@ import org.apache.maven.artifact.repository.ArtifactRepository;
 public class MultipleArtifactsNotFoundException
     extends ArtifactResolutionException
 {
+    private static final String LS = System.lineSeparator();
+
     private final List<Artifact> resolvedArtifacts;
     private final List<Artifact> missingArtifacts;
 
@@ -86,8 +88,8 @@ public class MultipleArtifactsNotFoundException
     {
         StringBuilder buffer = new StringBuilder( 256 );
 
-        buffer.append( "Missing:\n" );
+        buffer.append( "Missing:" ).append( LS );
-        buffer.append( "----------\n" );
+        buffer.append( "----------" ).append( LS );
 
         int counter = 0;
 
@@ -100,7 +102,7 @@ public class MultipleArtifactsNotFoundException
                     artifact.getDownloadUrl(), artifact.getDependencyTrail() ) );
         }
 
-        buffer.append( "----------\n" );
+        buffer.append( "----------" ).append( LS );
 
         int size = artifacts.size();
 
@@ -115,7 +117,7 @@ public class MultipleArtifactsNotFoundException
             buffer.append( " is" );
         }
 
-        buffer.append( " missing.\n\nfor artifact: " );
+        buffer.append( " missing." ).append( LS ).append( LS ).append( "for artifact: " );
 
         return buffer.toString();
     }

maven-core/src/main/java/org/apache/maven/artifact/repository/MavenArtifactRepository.java

@@ -37,6 +37,8 @@ import org.apache.maven.repository.Proxy;
 public class MavenArtifactRepository
     implements ArtifactRepository
 {
+    private static final String LS = System.lineSeparator();
+
     private String id;
 
     private String url;
@@ -139,25 +141,25 @@ public class MavenArtifactRepository
     {
         StringBuilder sb = new StringBuilder( 256 );
 
-        sb.append( "      id: " ).append( getId() ).append( '\n' );
+        sb.append( "      id: " ).append( getId() ).append( LS );
-        sb.append( "      url: " ).append( getUrl() ).append( '\n' );
+        sb.append( "      url: " ).append( getUrl() ).append( LS );
-        sb.append( "   layout: " ).append( layout != null ? layout : "none" ).append( '\n' );
+        sb.append( "   layout: " ).append( layout != null ? layout : "none" );
 
         if ( proxy != null )
         {
-            sb.append( "    proxy: " ).append( proxy.getHost() ).append( ':' ).append( proxy.getPort() ).append( '\n' );
+            sb.append( LS ).append( "    proxy: " ).append( proxy.getHost() ).append( ':' ).append( proxy.getPort() );
         }
 
         if ( snapshots != null )
         {
-            sb.append( "snapshots: [enabled => " ).append( snapshots.isEnabled() );
+            sb.append( LS ).append( "snapshots: [enabled => " ).append( snapshots.isEnabled() );
-            sb.append( ", update => " ).append( snapshots.getUpdatePolicy() ).append( "]\n" );
+            sb.append( ", update => " ).append( snapshots.getUpdatePolicy() ).append( ']' );
         }
 
         if ( releases != null )
         {
-            sb.append( " releases: [enabled => " ).append( releases.isEnabled() );
+            sb.append( LS ).append( "releases: [enabled => " ).append( releases.isEnabled() );
-            sb.append( ", update => " ).append( releases.getUpdatePolicy() ).append( "]\n" );
+            sb.append( ", update => " ).append( releases.getUpdatePolicy() ).append( ']' );
         }
 
         return sb.toString();

maven-core/src/main/java/org/apache/maven/artifact/repository/metadata/AbstractRepositoryMetadata.java

@@ -42,6 +42,8 @@ import java.io.Writer;
 public abstract class AbstractRepositoryMetadata
     implements RepositoryMetadata
 {
+    private static final String LS = System.lineSeparator();
+
     private Metadata metadata;
 
     protected AbstractRepositoryMetadata( Metadata metadata )
@@ -197,10 +199,10 @@ public abstract class AbstractRepositoryMetadata
     {
         StringBuilder buffer = new StringBuilder( 256 );
 
-        buffer.append( "\nRepository Metadata\n--------------------------" );
+        buffer.append( LS ).append( "Repository Metadata" ).append( LS ).append( "--------------------------" );
-        buffer.append( "\nGroupId: " ).append( getGroupId() );
+        buffer.append( LS ).append( "GroupId: " ).append( getGroupId() );
-        buffer.append( "\nArtifactId: " ).append( getArtifactId() );
+        buffer.append( LS ).append( "ArtifactId: " ).append( getArtifactId() );
-        buffer.append( "\nMetadata Type: " ).append( getClass().getName() );
+        buffer.append( LS ).append( "Metadata Type: " ).append( getClass().getName() );
 
         return buffer.toString();
     }

maven-core/src/main/java/org/apache/maven/artifact/resolver/ArtifactResolutionRequest.java

@@ -42,6 +42,7 @@ import org.apache.maven.settings.Server;
 public class ArtifactResolutionRequest
     implements RepositoryRequest
 {
+    private static final String LS = System.lineSeparator();
 
     private Artifact artifact;
 
@@ -234,11 +235,11 @@ public class ArtifactResolutionRequest
     public String toString()
     {
         StringBuilder sb = new StringBuilder()
-                .append( "REQUEST: " ).append(  "\n" )
+                .append( "REQUEST: " ).append( LS )
-                .append( "artifact: " ).append( artifact ).append(  "\n" )
+                .append( "artifact: " ).append( artifact ).append( LS )
-                .append( artifactDependencies ).append(  "\n" )
+                .append( artifactDependencies ).append( LS )
-                .append( "localRepository: " ).append(  localRepository ).append(  "\n" )
+                .append( "localRepository: " ).append( localRepository ).append( LS )
-                .append( "remoteRepositories: " ).append(  remoteRepositories ).append(  "\n" );
+                .append( "remoteRepositories: " ).append( remoteRepositories );
 
         return sb.toString();
     }

maven-core/src/main/java/org/apache/maven/artifact/resolver/ArtifactResolutionResult.java

@@ -47,6 +47,8 @@ import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
  */
 public class ArtifactResolutionResult
 {
+    private static final String LS = System.lineSeparator();
+
     private Artifact originatingArtifact;
 
     private List<Artifact> missingArtifacts;
@@ -359,14 +361,14 @@ public class ArtifactResolutionResult
         if ( artifacts != null )
         {
             int i = 1;
-            sb.append( "---------\n" );
+            sb.append( "---------" ).append( LS );
-            sb.append( artifacts.size() ).append( '\n' );
+            sb.append( artifacts.size() ).append( LS );
             for ( Artifact a : artifacts )
             {
-                sb.append( i ).append( ' ' ).append( a ).append( '\n' );
+                sb.append( i ).append( ' ' ).append( a ).append( LS );
                 i++;
             }
-            sb.append( "---------\n" );
+            sb.append( "---------" );
         }
 
         return sb.toString();

maven-core/src/main/java/org/apache/maven/exception/DefaultExceptionHandler.java

@@ -148,9 +148,9 @@ public class DefaultExceptionHandler
             return null;
         }
 
-        String message =
+        String message = System.lineSeparator()
-            "\nThe project " + result.getProjectId() + " (" + result.getPomFile() + ") has "
+            + "The project " + result.getProjectId() + " (" + result.getPomFile() + ") has "
-                + children.size() + " error" + ( children.size() == 1 ? "" : "s" );
+            + children.size() + " error" + ( children.size() == 1 ? "" : "s" );
 
         return new ExceptionSummary( null, message, null, children );
     }
@@ -290,7 +290,7 @@ public class DefaultExceptionHandler
                     }
                     else if ( !exceptionMessage.contains( longMessage ) )
                     {
-                        exceptionMessage = join( exceptionMessage, '\n' + longMessage );
+                        exceptionMessage = join( exceptionMessage, System.lineSeparator() + longMessage );
                     }
                 }
             }

maven-core/src/main/java/org/apache/maven/plugin/PluginParameterException.java

@@ -36,6 +36,8 @@ public class PluginParameterException
     extends PluginConfigurationException
 {
 
+    private static final String LS = System.lineSeparator();
+
     private final List<Parameter> parameters;
 
     private final MojoDescriptor mojo;
@@ -105,50 +107,53 @@ public class PluginParameterException
 
             messageBuffer.append( "Inside the definition for plugin \'" );
             messageBuffer.append( mojo.getPluginDescriptor().getArtifactId() );
-            messageBuffer.append( "\', specify the following:\n\n<configuration>\n  ...\n" );
+            messageBuffer.append( "\', specify the following:" ).append( LS ).append( LS );
+            messageBuffer.append( "<configuration>" ).append( LS ).append( "  ..." ).append( LS );
             messageBuffer.append( "  <" ).append( param.getName() ).append( '>' );
             if ( isArray || isCollection )
             {
-                messageBuffer.append( '\n' );
+                messageBuffer.append( LS );
                 messageBuffer.append( "    <item>" );
             }
             else if ( isProperties )
             {
-                messageBuffer.append( '\n' );
+                messageBuffer.append( LS );
-                messageBuffer.append( "    <property>\n" );
+                messageBuffer.append( "    <property>" ).append( LS );
-                messageBuffer.append( "      <name>KEY</name>\n" );
+                messageBuffer.append( "      <name>KEY</name>" ).append( LS );
                 messageBuffer.append( "      <value>" );
             }
             else if ( isMap )
             {
-                messageBuffer.append( '\n' );
+                messageBuffer.append( LS );
                 messageBuffer.append( "    <KEY>" );
             }
             messageBuffer.append( "VALUE" );
             if ( isArray || isCollection )
             {
-                messageBuffer.append( "</item>\n" );
+                messageBuffer.append( "</item>" ).append( LS );
                 messageBuffer.append( "  " );
             }
             else if ( isProperties )
             {
-                messageBuffer.append( "</value>\n" );
+                messageBuffer.append( "</value>" ).append( LS );
-                messageBuffer.append( "    </property>\n" );
+                messageBuffer.append( "    </property>" ).append( LS );
                 messageBuffer.append( "  " );
             }
             else if ( isMap )
             {
-                messageBuffer.append( "</KEY>\n" );
+                messageBuffer.append( "</KEY>" ).append( LS );
                 messageBuffer.append( "  " );
             }
-            messageBuffer.append( "</" ).append( param.getName() ).append( ">\n" );
+            messageBuffer.append( "</" ).append( param.getName() ).append( ">" ).append( LS );
             messageBuffer.append( "</configuration>" );
 
             String alias = param.getAlias();
             if ( StringUtils.isNotEmpty( alias ) && !alias.equals( param.getName() ) )
             {
-                messageBuffer.append( "\n\n-OR-\n\n<configuration>\n  ...\n  <" ).append( alias ).append(
+                messageBuffer.append( LS ).append( LS ).append( "-OR-" ).append( LS ).append( LS );
-                    ">VALUE</" ).append( alias ).append( ">\n</configuration>\n" );
+                messageBuffer.append( "<configuration>" ).append( LS ).append( "  ..." ).append( LS );
+                messageBuffer.append( "  <" ).append( alias ).append(
+                    ">VALUE</" ).append( alias ).append( ">" ).append( LS ).append( "</configuration>" ).append( LS );
             }
         }
 
@@ -160,7 +165,7 @@ public class PluginParameterException
         {
             if ( param.isEditable() )
             {
-                messageBuffer.append( "\n\n-OR-\n\n" );
+                messageBuffer.append( LS ).append( LS ).append( "-OR-" ).append( LS ).append( LS );
             }
 
             //addParameterUsageInfo( expression, messageBuffer );
@@ -176,18 +181,18 @@ public class PluginParameterException
 
         messageBuffer.append( "One or more required plugin parameters are invalid/missing for \'" )
             .append( mojo.getPluginDescriptor().getGoalPrefix() ).append( ':' ).append( mojo.getGoal() )
-            .append( "\'\n" );
+            .append( "\'" ).append( LS );
 
         int idx = 0;
         for ( Iterator<Parameter> it = params.iterator(); it.hasNext(); idx++ )
         {
             Parameter param = it.next();
 
-            messageBuffer.append( "\n[" ).append( idx ).append( "] " );
+            messageBuffer.append( LS ).append( "[" ).append( idx ).append( "] " );
 
             decomposeParameterIntoUserInstructions( mojo, param, messageBuffer );
 
-            messageBuffer.append( '\n' );
+            messageBuffer.append( LS );
         }
 
         return messageBuffer.toString();

maven-core/src/main/java/org/apache/maven/project/artifact/ActiveProjectArtifact.java

@@ -291,7 +291,7 @@ public class ActiveProjectArtifact
     /** {@inheritDoc} */
     public String toString()
     {
-        return "active project artifact:\n\tartifact = " + artifact + ";\n\tproject: " + project;
+        return "active project artifact[artifact: " + artifact + ", project: " + project + "]";
     }
 
     /** {@inheritDoc} */

maven-core/src/main/java/org/apache/maven/project/artifact/MavenMetadataSource.java

@@ -688,23 +688,23 @@ public class MavenMetadataSource
                         }
 
                         String message =
-                            "\n  This artifact has been relocated to " + artifact.getGroupId() + ":"
+                            "  this artifact has been relocated to " + artifact.getGroupId() + ":"
-                                + artifact.getArtifactId() + ":" + artifact.getVersion() + ".\n";
+                                + artifact.getArtifactId() + ":" + artifact.getVersion() + ".";
 
                         if ( relocation.getMessage() != null )
                         {
-                            message += "  " + relocation.getMessage() + "\n";
+                            message += "  " + relocation.getMessage();
                         }
 
                         if ( artifact.getDependencyTrail() != null && artifact.getDependencyTrail().size() == 1 )
                         {
                             logger.warn( "While downloading " + pomArtifact.getGroupId() + ":"
-                                + pomArtifact.getArtifactId() + ":" + pomArtifact.getVersion() + message + "\n" );
+                                + pomArtifact.getArtifactId() + ":" + pomArtifact.getVersion() + message );
                         }
                         else
                         {
                             logger.debug( "While downloading " + pomArtifact.getGroupId() + ":"
-                                + pomArtifact.getArtifactId() + ":" + pomArtifact.getVersion() + message + "\n" );
+                                + pomArtifact.getArtifactId() + ":" + pomArtifact.getVersion() + message );
                         }
                     }
                     else

maven-core/src/main/java/org/apache/maven/repository/legacy/metadata/AbstractArtifactMetadata.java

@@ -29,6 +29,8 @@ import org.apache.maven.artifact.Artifact;
 public abstract class AbstractArtifactMetadata
     implements ArtifactMetadata
 {
+    private static final String LS = System.lineSeparator();
+
     protected Artifact artifact;
 
     protected AbstractArtifactMetadata( Artifact artifact )
@@ -55,10 +57,10 @@ public abstract class AbstractArtifactMetadata
     {
         StringBuilder buffer = new StringBuilder( 256 );
 
-        buffer.append( "\nArtifact Metadata\n--------------------------" );
+        buffer.append( LS ).append( "Artifact Metadata" ).append( LS ).append( "--------------------------" );
-        buffer.append( "\nGroupId: " ).append( getGroupId() );
+        buffer.append( LS ).append( "GroupId: " ).append( getGroupId() );
-        buffer.append( "\nArtifactId: " ).append( getArtifactId() );
+        buffer.append( LS ).append( "ArtifactId: " ).append( getArtifactId() );
-        buffer.append( "\nMetadata Type: " ).append( getClass().getName() );
+        buffer.append( LS ).append( "Metadata Type: " ).append( getClass().getName() );
 
         return buffer.toString();
     }

maven-core/src/main/java/org/apache/maven/settings/SettingsConfigurationException.java

@@ -43,8 +43,8 @@ public class SettingsConfigurationException
 
     public SettingsConfigurationException( String message, Throwable cause, int lineNumber, int columnNumber )
     {
-        super( message + ( lineNumber > 0 ? "\n  Line:   " + lineNumber : "" )
+        super( message + ( lineNumber > 0 ? System.lineSeparator() + "  Line:   " + lineNumber : "" )
-            + ( columnNumber > 0 ? "\n  Column: " + columnNumber : "" ), cause );
+            + ( columnNumber > 0 ? System.lineSeparator() + "  Column: " + columnNumber : "" ), cause );
         this.lineNumber = lineNumber;
         this.columnNumber = columnNumber;
     }

maven-core/src/test/java/org/apache/maven/plugin/PluginParameterExceptionTest.java

@@ -37,6 +37,8 @@ public class PluginParameterExceptionTest
     extends TestCase
 {
 
+    private final String LS = System.lineSeparator();
+
     public void testMissingRequiredStringArrayTypeParameter()
     {
         MojoDescriptor mojoDescriptor = new MojoDescriptor();
@@ -55,16 +57,16 @@ public class PluginParameterExceptionTest
         PluginParameterException exception =
             new PluginParameterException( mojoDescriptor, Collections.singletonList( parameter ) );
 
-        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'\n" +
+        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'" +
-                "\n" +
+                LS + LS +
-                "[0] Inside the definition for plugin 'artifactId', specify the following:\n" +
+                "[0] Inside the definition for plugin 'artifactId', specify the following:" +
-                "\n" +
+                LS + LS +
-                "<configuration>\n" +
+                "<configuration>" + LS +
-                "  ...\n" +
+                "  ..." + LS +
-                "  <toAddresses>\n" +
+                "  <toAddresses>" + LS +
-                "    <item>VALUE</item>\n" +
+                "    <item>VALUE</item>" + LS +
-                "  </toAddresses>\n" +
+                "  </toAddresses>" + LS +
-                "</configuration>.\n", exception.buildDiagnosticMessage() );
+                "</configuration>." + LS, exception.buildDiagnosticMessage() );
     }
 
     public void testMissingRequiredCollectionTypeParameter()
@@ -85,16 +87,16 @@ public class PluginParameterExceptionTest
         PluginParameterException exception =
             new PluginParameterException( mojoDescriptor, Collections.singletonList( parameter ) );
 
-        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'\n" +
+        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'" +
-                "\n" +
+                LS + LS +
-                "[0] Inside the definition for plugin 'artifactId', specify the following:\n" +
+                "[0] Inside the definition for plugin 'artifactId', specify the following:" +
-                "\n" +
+                LS + LS +
-                "<configuration>\n" +
+                "<configuration>" + LS +
-                "  ...\n" +
+                "  ..." + LS +
-                "  <toAddresses>\n" +
+                "  <toAddresses>" + LS +
-                "    <item>VALUE</item>\n" +
+                "    <item>VALUE</item>" + LS +
-                "  </toAddresses>\n" +
+                "  </toAddresses>" + LS +
-                "</configuration>.\n", exception.buildDiagnosticMessage() );
+                "</configuration>." + LS, exception.buildDiagnosticMessage() );
     }
 
     public void testMissingRequiredMapTypeParameter()
@@ -115,16 +117,16 @@ public class PluginParameterExceptionTest
         PluginParameterException exception =
             new PluginParameterException( mojoDescriptor, Collections.singletonList( parameter ) );
 
-        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'\n" +
+        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'" +
-                "\n" +
+                LS + LS +
-                "[0] Inside the definition for plugin 'artifactId', specify the following:\n" +
+                "[0] Inside the definition for plugin 'artifactId', specify the following:" +
-                "\n" +
+                LS + LS +
-                "<configuration>\n" +
+                "<configuration>" + LS +
-                "  ...\n" +
+                "  ..." + LS +
-                "  <toAddresses>\n" +
+                "  <toAddresses>" + LS +
-                "    <KEY>VALUE</KEY>\n" +
+                "    <KEY>VALUE</KEY>" + LS +
-                "  </toAddresses>\n" +
+                "  </toAddresses>" + LS +
-                "</configuration>.\n", exception.buildDiagnosticMessage() );
+                "</configuration>." + LS, exception.buildDiagnosticMessage() );
     }
 
     public void testMissingRequiredPropertiesTypeParameter()
@@ -145,20 +147,19 @@ public class PluginParameterExceptionTest
         PluginParameterException exception =
             new PluginParameterException( mojoDescriptor, Collections.singletonList( parameter ) );
 
-        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'\n" +
+        assertEquals( "One or more required plugin parameters are invalid/missing for 'goalPrefix:goal'" +
-                "\n" +
+                LS + LS +
-                "[0] Inside the definition for plugin 'artifactId', specify the following:\n" +
+                "[0] Inside the definition for plugin 'artifactId', specify the following:" +
-                "\n" +
+                LS + LS +
-                "<configuration>\n" +
+                "<configuration>" + LS +
-                "  ...\n" +
+                "  ..." + LS +
-                "  <toAddresses>\n" +
+                "  <toAddresses>" + LS +
-                "    <property>\n" +
+                "    <property>" + LS +
-                "      <name>KEY</name>\n" +
+                "      <name>KEY</name>" + LS +
-                "      <value>VALUE</value>\n" +
+                "      <value>VALUE</value>" + LS +
-                "    </property>\n" +
+                "    </property>" + LS +
-                "  </toAddresses>\n" +
+                "  </toAddresses>" + LS +
-                "</configuration>.\n", exception.buildDiagnosticMessage() );
+                "</configuration>." + LS, exception.buildDiagnosticMessage() );
     }
 
-
 }

maven-embedder/src/main/java/org/apache/maven/cli/CLIManager.java

@@ -176,8 +176,10 @@ public class CLIManager
 
         HelpFormatter formatter = new HelpFormatter();
 
-        formatter.printHelp( pw, HelpFormatter.DEFAULT_WIDTH, "mvn [options] [<goal(s)>] [<phase(s)>]", "\nOptions:",
+        formatter.printHelp( pw, HelpFormatter.DEFAULT_WIDTH, "mvn [options] [<goal(s)>] [<phase(s)>]",
-                             options, HelpFormatter.DEFAULT_LEFT_PAD, HelpFormatter.DEFAULT_DESC_PAD, "\n", false );
+                             System.lineSeparator() + "Options:", options,
+                             HelpFormatter.DEFAULT_LEFT_PAD, HelpFormatter.DEFAULT_DESC_PAD,
+                             System.lineSeparator(), false );
 
         pw.flush();
     }

maven-embedder/src/main/java/org/apache/maven/cli/MavenCli.java

@@ -1231,7 +1231,7 @@ public class MavenCli
             // There are too many ConfigurationProcessors so we don't know which one to run so report the error.
             //
             StringBuilder sb = new StringBuilder(
-                String.format( "\nThere can only be one user supplied ConfigurationProcessor, there are %s:\n\n",
+                String.format( "%nThere can only be one user supplied ConfigurationProcessor, there are %s:%n%n",
                                userSuppliedConfigurationProcessorCount ) );
             for ( Entry<String, ConfigurationProcessor> entry : configurationProcessors.entrySet() )
             {
@@ -1239,10 +1239,9 @@ public class MavenCli
                 if ( !hint.equals( SettingsXmlConfigurationProcessor.HINT ) )
                 {
                     ConfigurationProcessor configurationProcessor = entry.getValue();
-                    sb.append( String.format( "%s\n", configurationProcessor.getClass().getName() ) );
+                    sb.append( String.format( "%s%n", configurationProcessor.getClass().getName() ) );
                 }
             }
-            sb.append( "\n" );
             throw new Exception( sb.toString() );
         }
     }

maven-plugin-api/src/main/java/org/apache/maven/plugin/descriptor/DuplicateMojoDescriptorException.java

@@ -30,8 +30,8 @@ public class DuplicateMojoDescriptorException
                                              String newImplementation )
     {
         super( "Goal: " + goal + " already exists in the plugin descriptor for prefix: " + goalPrefix
-            + "\nExisting implementation is: " + existingImplementation
+            + System.lineSeparator() + "Existing implementation is: " + existingImplementation
-            + "\nConflicting implementation is: " + newImplementation );
+            + System.lineSeparator() + "Conflicting implementation is: " + newImplementation );
     }
 
 }

maven-plugin-api/src/main/java/org/apache/maven/plugin/logging/SystemStreamLog.java

@@ -123,7 +123,8 @@ public class SystemStreamLog
 
         error.printStackTrace( pWriter );
 
-        System.err.println( "[error] " + content.toString() + "\n\n" + sWriter.toString() );
+        System.err.println( "[error] " + content.toString()
+                            + System.lineSeparator() + System.lineSeparator() + sWriter.toString() );
     }
 
     /**
@@ -194,6 +195,7 @@ public class SystemStreamLog
 
         error.printStackTrace( pWriter );
 
-        System.out.println( "[" + prefix + "] " + content.toString() + "\n\n" + sWriter.toString() );
+        System.out.println( "[" + prefix + "] " + content.toString()
+                            + System.lineSeparator() + System.lineSeparator() + sWriter.toString() );
     }
 }