Re: [PATCH v2] Remove useless uses of cat, and replace with filename arguments or redirection

> Replace all uses of cat that do nothing other than read a single file.  In the
> case of git-quilt-import, this occurs once per patch.
>
> Signed-off-by: Josh Triplett <josh@freedesktop.org>
> ---
>
> This revised version fixes a bug caught by Stephen Rothwell: the output of wc
> -l changes when it has a filename on the command line.  The same bug occurred
> in one other place as well.

> diff --git a/git-filter-branch.sh b/git-filter-branch.sh
> index 0c8a7df..346cf3f 100644
> --- a/git-filter-branch.sh
> +++ b/git-filter-branch.sh
> @@ -333,7 +333,7 @@ for commit in $unchanged; do
>  done
>  
>  git-rev-list --reverse --topo-order $srcbranch --not $unchanged >../revs
> -commits=$(cat ../revs | wc -l | tr -d " ")
> +commits=$(wc -l ../revs | tr -d -c 0-9)