On 2011-06-15, Alexander Hall <ha...@openbsd.org> wrote: >> This dif fixes your problem here. Big question is of course: does it >> break other cases? > > It differs from perl like this: > > $ echo 'l1_1' | perl -pe 's/1|$/X/g' > lX_XX > $ echo 'l1_1' | sed -E 's/1|$/X/g' > lX_X > > Meaning we don't hit that final '$' if the last match went to eol.
perl regular expressions are expected to behave differently to posix REs.
