docbook and glibc breakage [STILL BREAKING EVERYTHING]

[Jaroslav Skarvada]

> To clear the confusion, there is no change in the RE syntax in
> grep-2.7. The old grep silently interprets all these REs the way that
> probably nobody intended to, e.g.
> 
> The [:space:] match:
> ac:eps
> 

You can force grep-2.7 to silently process it (above mentioned way, same as with older greps) by setting POSIXLY_CORRECT
environment variable. But all such REs are probably typos

Jaroslav