···78787979--merge-base=<tree-ish>::
8080 Instead of finding the merge-bases for <branch1> and <branch2>,
8181- specify a merge-base for the merge, and specifying multiple bases is
8282- currently not supported. This option is incompatible with `--stdin`.
8181+ specify a merge-base for the merge. This option is incompatible with
8282+ `--stdin`.
8383+
8484-As the merge-base is provided directly, <branch1> and <branch2> do not need
8585-to specify commits; trees are enough.
8484+Specifying multiple bases is currently not supported, which means that when
8585+merging two branches with more than one merge-base, using this option may
8686+cause merge results to differ from what `git merge` would compute. This
8787+can include potentially losing some changes made on one side of the history
8888+in the resulting merge.
8989++
9090+With this option, since the merge-base is provided directly, <branch1> and
9191+<branch2> do not need to specify commits; trees are enough.
86928793-X<option>::
8894--strategy-option=<option>::