Re: [PATCH/RFC v1 1/1] test-lint: sed -E (or -a, -l) are not portable

> From `man sed` (on a Mac OS X box):
> The -E, -a and -i options are non-standard FreeBSD extensions and may not be available
> on other operating systems.
> [...]
> To be on the safe side, don't allow it.
>
> Signed-off-by: Torsten Bögershausen <tboegi@web.de>
> ---
> diff --git a/t/check-non-portable-shell.pl b/t/check-non-portable-shell.pl
> @@ -35,7 +35,7 @@ sub err {
> -       /\bsed\s+-i/ and err 'sed -i is not portable';
> +       /\bsed\s+-[Eail]/ and err 'Not portable option with sed. Only -e -f -n are portable';
>         /\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
>         /^\s*declare\s+/ and err 'arrays/declare not portable';
>         /^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';