Re: [PATCH v2 0/2] make macOS `git maintenance` test work on Windows

> Also as another aside (but your patch is fine as it is), my suggestion
> used Perl+Perl RX but you switched it to sed+BRE. Do we want to avoid
> "sed -E"? I wondered that for something else the other day, we have
> this:
>
>     t/check-non-portable-shell.pl:  /\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
>
> So maybe it means "nothing but -nef, or maybe "don't use -efn". The ERE
> (-E and -r) options aren't mentioned, and a naïve log search of of "sed
> -E" and "sed -r" in t/ returns nothing.