git-merge: warn when -m provided on a fast forward

diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 8977877b21b6681528d13f71b558c060e8c26c4d..b88764f45f9deb6e82f7b3bfb65bacebced5ef16 100644 (file)
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -8,7 +8,7 @@ git-diff - Show changes between commits, commit and working tree, etc
 
 SYNOPSIS
 --------
-'git-diff' [ --diff-options ] <commit>{0,2} [--] [<path>...]
+'git-diff' [<common diff options>] <commit>{0,2} [--] [<path>...]
 
 DESCRIPTION
 -----------
@@ -47,6 +47,9 @@ Just in case if you are doing something exotic, it should be
 noted that all of the <commit> in the above description can be
 any <tree-ish>.
 
+For a more complete list of ways to spell <commit>, see
+"SPECIFYING REVISIONS" section in gitlink:git-rev-parse[1].
+
 
 OPTIONS
 -------