+--summary::
+ Show a diffstat at the end of the merge. The diffstat is also
+ controlled by the configuration option merge.diffstat.
+
-n, \--no-summary::
Do not show diffstat at the end of the merge.
If there is no `-s` option, a built-in list of strategies
is used instead (`git-merge-recursive` when merging a single
head, `git-merge-octopus` otherwise).
-