git merge documentation: -m is optional

diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 8977877b21b6681528d13f71b558c060e8c26c4d..6a098df26b1c1639f6ac88233b5642a2be9039fa 100644 (file)
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -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
 -------