Stephane Chazelas wrote:
> The doc has a confusing statement ... Same confusion in tests/pcre:

Thanks, I installed the attached patch to fix those.

> We can match a newline with grep -zP 'a\nb' (or '\x0a' or '\012'
> or '[\n]'...) but not easily without -P. Same for NUL
> characters.

Yes, that's a downside of the POSIX notation, and it'd be nice to extend 
POSIX to allow easy matching for newlines and/or null bytes.  I'll mark 
this bug report as a wishlist bug.