Prefix an abnormal CLI command termination with 'fatal:'

Change-Id: I3d257666c6fbed7b238c575808f73ec518e811b9
Signed-off-by: Chris Aniszczyk <zx@twitter.com>

org.eclipse.jgit.pgm.test/src/org/eclipse/jgit/pgm/CLIGitCommand.java

@@ -43,6 +43,7 @@
 package org.eclipse.jgit.pgm;
 
 import java.io.ByteArrayOutputStream;
+import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -91,7 +92,8 @@ public class CLIGitCommand {
 			cmd.execute(bean.getArguments().toArray(
 					new String[bean.getArguments().size()]));
 		} catch (Die e) {
-			return IO.readLines(e.getMessage());
+			return IO.readLines(MessageFormat.format(CLIText.get().fatalError,
+					e.getMessage()));
 		} finally {
 			if (cmd.outw != null)
 				cmd.outw.flush();

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/BranchTest.java

@@ -65,7 +65,7 @@ public class BranchTest extends CLIRepositoryTestCase {
 
 	@Test
 	public void testExistingBranch() throws Exception {
-		assertEquals("A branch named 'master' already exists.",
+		assertEquals("fatal: A branch named 'master' already exists.",
 				execute("git branch master")[0]);
 	}
 }

org.eclipse.jgit.pgm.test/tst/org/eclipse/jgit/pgm/CheckoutTest.java

@@ -83,13 +83,13 @@ public class CheckoutTest extends CLIRepositoryTestCase {
 	public void testCheckoutNewBranchThatAlreadyExists() throws Exception {
 		new Git(db).commit().setMessage("initial commit").call();
 
-		assertEquals("A branch named 'master' already exists.",
+		assertEquals("fatal: A branch named 'master' already exists.",
 				execute("git checkout -b master"));
 	}
 
 	@Test
 	public void testCheckoutNewBranchOnBranchToBeBorn() throws Exception {
-		assertEquals("You are on a branch yet to be born",
+		assertEquals("fatal: You are on a branch yet to be born",
 				execute("git checkout -b side"));
 	}
 

org.eclipse.jgit.pgm/resources/org/eclipse/jgit/pgm/CLIText.properties

@@ -53,7 +53,6 @@ failedToCommitIndex=failed to commit index
 failedToLockIndex=failed to lock index
 failedToLockTag=Failed to lock tag {0}: {1}
 fatalError=fatal: {0}
-fatalErrorTagExists=fatal: tag '{0}' exists
 fatalThisProgramWillDestroyTheRepository=fatal: This program will destroy the repository\nfatal:\nfatal:\nfatal:    {0}\nfatal:\nfatal: To continue, add {1} to the command line\nfatal:
 fileIsRequired=argument file is required
 forcedUpdate=forced update

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

@@ -120,7 +120,6 @@ public class CLIText extends TranslationBundle {
 	/***/ public String failedToLockIndex;
 	/***/ public String failedToLockTag;
 	/***/ public String fatalError;
-	/***/ public String fatalErrorTagExists;
 	/***/ public String fatalThisProgramWillDestroyTheRepository;
 	/***/ public String fileIsRequired;
 	/***/ public String forcedUpdate;