Re: [PATCH] merge-tree: accept 3 trees as arguments

> When specifying a merge base explicitly, there is actually no good
> reason why the inputs need to be commits: that's only needed if the
> merge base has to be deduced from the commit graph.
>
> This commit is best viewed with `--color-moved
> --color-moved-ws=allow-indentation-change`.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
> diff --git a/Documentation/git-merge-tree.txt b/Documentation/git-merge-tree.txt
> @@ -64,10 +64,13 @@ OPTIONS
> +--merge-base=<tree-ish>::
>         Instead of finding the merge-bases for <branch1> and <branch2>,
>         specify a merge-base for the merge, and specifying multiple bases is
>         currently not supported. This option is incompatible with `--stdin`.
> ++
> +As the merge-base is provided directly, <branch1> and <branch2> do not need
> +o specify commits; it is sufficient if they specify trees.