···79798080--merge-base=<tree-ish>::
8181 Instead of finding the merge-bases for <branch1> and <branch2>,
8282- specify a merge-base for the merge, and specifying multiple bases is
8383- currently not supported. This option is incompatible with `--stdin`.
8282+ specify a merge-base for the merge. This option is incompatible with
8383+ `--stdin`.
8484+
8585-As the merge-base is provided directly, <branch1> and <branch2> do not need
8686-to specify commits; trees are enough.
8585+Specifying multiple bases is currently not supported, which means that when
8686+merging two branches with more than one merge-base, using this option may
8787+cause merge results to differ from what `git merge` would compute. This
8888+can include potentially losing some changes made on one side of the history
8989+in the resulting merge.
9090++
9191+With this option, since the merge-base is provided directly, <branch1> and
9292+<branch2> do not need to specify commits; trees are enough.
87938894-X<option>::
8995--strategy-option=<option>::