use %n for new lines in format strings

core/src/main/java/hudson/Util.java

@@ -1033,7 +1033,7 @@ public class Util {
                 listener.getLogger().println(String.format("ln -s %s %s failed: %d %s",targetPath, symlinkFile, r, errmsg));
         } catch (IOException e) {
             PrintStream log = listener.getLogger();
-            log.printf("ln %s %s failed\n",targetPath, new File(baseDir, symlinkPath));
+            log.printf("ln %s %s failed%n",targetPath, new File(baseDir, symlinkPath));
             Util.displayIOException(e,listener);
             e.printStackTrace( log );
         }

core/src/main/java/hudson/cli/ListChangesCommand.java

@@ -60,7 +60,7 @@ public class ListChangesCommand extends AbstractBuildRangeCommand {
             for (AbstractBuild build : builds) {
                 ChangeLogSet<?> cs = build.getChangeSet();
                 for (Entry e : cs) {
-                    stdout.printf("%s,%s\n",
+                    stdout.printf("%s,%s%n",
                             QuotedStringTokenizer.quote(e.getAuthor().getId()),
                             QuotedStringTokenizer.quote(e.getMsg()));
                 }
@@ -70,7 +70,7 @@ public class ListChangesCommand extends AbstractBuildRangeCommand {
             for (AbstractBuild build : builds) {
                 ChangeLogSet<?> cs = build.getChangeSet();
                 for (Entry e : cs) {
-                    stdout.printf("%s\t%s\n",e.getAuthor(),e.getMsg());
+                    stdout.printf("%s\t%s%n",e.getAuthor(),e.getMsg());
                     for (String p : e.getAffectedPaths())
                         stdout.println("  "+p);
                 }

core/src/main/java/hudson/matrix/MatrixBuild.java

@@ -220,7 +220,7 @@ public class MatrixBuild extends AbstractBuild<MatrixProject,MatrixBuild> {
                 }
                 
                 if (p.getTouchStoneResultCondition() != null && r.isWorseThan(p.getTouchStoneResultCondition())) {
-                    logger.printf("Touchstone configurations resulted in %s, so aborting...\n", r);
+                    logger.printf("Touchstone configurations resulted in %s, so aborting...%n", r);
                     return r;
                 }
                 

core/src/main/java/hudson/tasks/junit/TestResult.java

@@ -170,8 +170,8 @@ public final class TestResult extends MetaTabulatedResult {
             File f = new File(baseDir,includedFiles[0]);
             throw new AbortException(
                 String.format(
-                "Test reports were found but none of them are new. Did tests run? \n"+
-                "For example, %s is %s old\n", f,
+                "Test reports were found but none of them are new. Did tests run? %n"+
+                "For example, %s is %s old%n", f,
                 Util.getTimeSpanString(buildTime-f.lastModified())));
         }
     }

core/src/main/java/hudson/tasks/test/DefaultTestResultParserImpl.java

@@ -103,8 +103,8 @@ public abstract class DefaultTestResultParserImpl extends TestResultParser imple
                     // none of the files were new
                     throw new AbortException(
                         String.format(
-                        "Test reports were found but none of them are new. Did tests run? \n"+
-                        "For example, %s is %s old\n", paths[0].getRemote(),
+                        "Test reports were found but none of them are new. Did tests run? %n"+
+                        "For example, %s is %s old%n", paths[0].getRemote(),
                         Util.getTimeSpanString(localBuildTime-paths[0].lastModified())));
                 }