Redirect all Show output to outs

The Show command wrote all diffs to System.out instead of 'outs.

Bug: 494143
Change-Id: Ibc78e9a058b7a32d536e03e294c1d933b6c26ba7
Signed-off-by: Rüdiger Herrmann <ruediger.herrmann@gmx.de>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/Show.java

@@ -63,6 +63,7 @@ import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.FileMode;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.PersonIdent;
+import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.pgm.internal.CLIText;
 import org.eclipse.jgit.pgm.opt.PathTreeFilterHandler;
 import org.eclipse.jgit.revwalk.RevCommit;
@@ -81,8 +82,7 @@ class Show extends TextBuiltin {
 
 	private final DateFormat fmt;
 
-	private final DiffFormatter diffFmt = new DiffFormatter( //
-			new BufferedOutputStream(System.out));
+	private DiffFormatter diffFmt;
 
 	@Argument(index = 0, metaVar = "metaVar_object")
 	private String objectName;
@@ -165,6 +165,12 @@ class Show extends TextBuiltin {
 		fmt = new SimpleDateFormat("EEE MMM dd HH:mm:ss yyyy ZZZZZ", Locale.US); //$NON-NLS-1$
 	}
 
+	@Override
+	protected void init(final Repository repository, final String gitDir) {
+		super.init(repository, gitDir);
+		diffFmt = new DiffFormatter(new BufferedOutputStream(outs));
+	}
+
 	@SuppressWarnings("boxing")
 	@Override
 	protected void run() throws Exception {