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-rw-r--r--Documentation/git-diff.txt10
1 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 7f4c8a8ce7..6236c75c9b 100644
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -51,16 +51,20 @@ files on disk.
--staged is a synonym of --cached.
+
If --merge-base is given, instead of using <commit>, use the merge base
-of <commit> and HEAD. `git diff --merge-base A` is equivalent to
-`git diff $(git merge-base A HEAD)`.
+of <commit> and HEAD. `git diff --cached --merge-base A` is equivalent to
+`git diff --cached $(git merge-base A HEAD)`.
-'git diff' [<options>] <commit> [--] [<path>...]::
+'git diff' [<options>] [--merge-base] <commit> [--] [<path>...]::
This form is to view the changes you have in your
working tree relative to the named <commit>. You can
use HEAD to compare it with the latest commit, or a
branch name to compare with the tip of a different
branch.
++
+If --merge-base is given, instead of using <commit>, use the merge base
+of <commit> and HEAD. `git diff --merge-base A` is equivalent to
+`git diff $(git merge-base A HEAD)`.
'git diff' [<options>] [--merge-base] <commit> <commit> [--] [<path>...]::