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-rw-r--r--Documentation/git-commit-tree.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/git-commit-tree.txt b/Documentation/git-commit-tree.txt
index f5f2a8d..a0b5457 100644
--- a/Documentation/git-commit-tree.txt
+++ b/Documentation/git-commit-tree.txt
@@ -56,7 +56,9 @@ OPTIONS
-S[<keyid>]::
--gpg-sign[=<keyid>]::
- GPG-sign commit.
+ GPG-sign commits. The `keyid` argument is optional and
+ defaults to the committer identity; if specified, it must be
+ stuck to the option without a space.
--no-gpg-sign::
Countermand `commit.gpgSign` configuration variable that is