[PATCH] difftool: add a -y shortcut for --no-prompt

[David Aguilar <davvid@gmail.com>]

This is another consistency cleanup to make git-difftool's options
match git-mergetool.

Signed-off-by: David Aguilar <davvid@gmail.com>
---

This also fixes the style used for the -h option which I should
have caught in my previous patch.  Doh!

 Documentation/git-difftool.txt |    3 ++-
 git-difftool.perl              |    6 +++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index 23070c1..be1020d 100644
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -7,7 +7,7 @@ git-difftool - Show changes using common diff tools
 
 SYNOPSIS
 --------
-'git difftool' [--tool=<tool>] [--no-prompt] [<'git diff' options>]
+'git difftool' [--tool=<tool>] [-y|--no-prompt] [<'git diff' options>]
 
 DESCRIPTION
 -----------
@@ -17,6 +17,7 @@ to 'git-diff' and accepts the same options and arguments.
 
 OPTIONS
 -------
+-y::
 --no-prompt::
 	Do not prompt before launching a diff tool.
 
diff --git a/git-difftool.perl b/git-difftool.perl
index 207dd50..5bc64d5 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -18,7 +18,7 @@ my $DIR = abs_path(dirname($0));
 sub usage
 {
 	print << 'USAGE';
-usage: git difftool [--tool=<tool>] [--no-prompt] ["git diff" options]
+usage: git difftool [--tool=<tool>] [-y|--no-prompt] ["git diff" options]
 USAGE
 	exit 1;
 }
@@ -60,11 +60,11 @@ sub generate_command
 			$ENV{GIT_DIFF_TOOL} = substr($arg, 7);
 			next;
 		}
-		if ($arg eq '--no-prompt') {
+		if ($arg eq '-y' || '--no-prompt') {
 			$ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true';
 			next;
 		}
-		if ($arg eq '-h' or $arg eq '--help') {
+		if ($arg eq '-h' || $arg eq '--help') {
 			usage();
 		}
 		push @command, $arg;
-- 
1.6.2.1.303.g63699