From 16507fcf0a9991976815972faa253d77804d6f35 Mon Sep 17 00:00:00 2001
From: Bill Lear <rael@zopyra.com>
Date: Sat, 27 Jan 2007 07:21:53 -0600
Subject: [PATCH] Document --check option to git diff.

Signed-off-by: Bill Lear <rael@zopyra.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 Documentation/SubmittingPatches | 3 ++-
 Documentation/diff-options.txt  | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 41b76d8a4a..ce85d06c62 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -23,7 +23,8 @@ probably need to split up your commit to finer grained pieces.
 
 Oh, another thing.  I am picky about whitespaces.  Make sure your
 changes do not trigger errors with the sample pre-commit hook shipped
-in templates/hooks--pre-commit.
+in templates/hooks--pre-commit.  To help ensure this does not happen,
+run git diff --check on your changes before you commit.
 
 
 (2) Generate your patch using git tools out of your commits.
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index da1cc60e97..019a39f2bf 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -58,6 +58,10 @@
 	Turn off rename detection, even when the configuration
 	file gives the default to do so.
 
+--check::
+	Warn if changes introduce trailing whitespace
+	or an indent that uses a space before a tab.
+
 --full-index::
 	Instead of the first handful characters, show full
 	object name of pre- and post-image blob on the "index"