Use the system line separator instead of \n

Author: plamentotev

src/main/java/org/codehaus/plexus/components/io/attributes/FileAttributes.java

@@ -175,13 +175,21 @@ public boolean isWorldWritable() {
 
     public String toString() {
         StringBuilder sb = new StringBuilder();
-        sb.append("\nFile Attributes:\n------------------------------\nuser: ");
+        sb.append(System.lineSeparator());
+        sb.append("File Attributes:");
+        sb.append(System.lineSeparator());
+        sb.append("------------------------------");
+        sb.append(System.lineSeparator());
+        sb.append("user: ");
         sb.append(userName == null ? "" : userName);
-        sb.append("\ngroup: ");
+        sb.append(System.lineSeparator());
+        sb.append("group: ");
         sb.append(groupName == null ? "" : groupName);
-        sb.append("\nuid: ");
+        sb.append(System.lineSeparator());
+        sb.append("uid: ");
         sb.append(hasUserId() ? Integer.toString(userId) : "");
-        sb.append("\ngid: ");
+        sb.append(System.lineSeparator());
+        sb.append("gid: ");
         sb.append(hasGroupId() ? Integer.toString(groupId) : "");
 
         return sb.toString();

src/main/java/org/codehaus/plexus/components/io/attributes/SimpleResourceAttributes.java

@@ -170,7 +170,7 @@ public PlexusIoResourceAttributes setOctalModeString( String mode )
     public String toString()
     {
         return String.format(
-            "\nResource Attributes:\n------------------------------\nuser: %s\ngroup: %s\nuid: %d\ngid: %d\nmode: %06o",
+            "%nResource Attributes:%n------------------------------%nuser: %s%ngroup: %s%nuid: %d%ngid: %d%nmode: %06o",
             userName == null ? "" : userName,
             groupName == null ? "" : groupName,
             uid != null ? uid : 0,