This is the filter for performing the commit.
If this filter is specified, it will be called instead of the
'git commit-tree' command, with arguments of the form
- "<TREE_ID> [-p <PARENT_COMMIT_ID>]..." and the log message on
+ "<TREE_ID> [(-p <PARENT_COMMIT_ID>)...]" and the log message on
stdin. The commit id is expected on stdout.
+
As a special extension, the commit filter may emit multiple