! complex_preg_chars is a legacy thing from 2.0 that I thought was still in 2.1... but isn't. Fixes #843.

Signed-off-by: Peter Spicer <sleeping@myperch.org>
Merge pull request #845 from Arantor/release-2.1

! complex_preg_chars is a legacy thing from 2.0 that I thought was still...