patchgit-rebase.txt: fix typo

>
> From: Philippe Blain <levraiphilippeblain@gmail.com>
>
> Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
> ---
>     git-rebase.txt: fix typo
>
>     CC: Junio C Hamano gitster@pobox.com [gitster@pobox.com], Elijah Newren
>     newren@gmail.com [newren@gmail.com]
>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-740%2Fphil-blain%2Fdoc-rebase-typo-v1
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-740/phil-blain/doc-rebase-typo-v1
> Pull-Request: https://github.com/git/git/pull/740
>
>  Documentation/git-rebase.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
> index f7a6033607f..46ddf172d9c 100644
> --- a/Documentation/git-rebase.txt
> +++ b/Documentation/git-rebase.txt
> @@ -605,7 +605,7 @@ BEHAVIORAL DIFFERENCES
>  -----------------------
>
>  git rebase has two primary backends: apply and merge.  (The apply
> -backend used to known as the 'am' backend, but the name led to
> +backend used to be known as the 'am' backend, but the name led to
>  confusion as it looks like a verb instead of a noun.  Also, the merge
>  backend used to be known as the interactive backend, but it is now
>  used for non-interactive cases as well.  Both were renamed based on
>
> base-commit: 3bab5d56259722843359702bc27111475437ad2a