Ramsay Jones <ramsay@ramsayjones.plus.com> writes:
>>> - /\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
>>> + /\bsed\s+-[^Eefn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
>
> .. and, perhaps, add -E to the error message?