doc: remove Emacs-specific documentation; match code

* doc/regex.texi: Remove mention of both Emacs and non-Emacs syntax tables,
as these are no longer supported by the code. Document the word character
class (alnum + _).   Add documentation for \s and \S.  Replace mentions
of #defining emacs with RE_NO_GNU_OPS (which takes effect in the opposite
sense); merge the node “GNU Emacs Operators” into “GNU Operators”.  For \`
and \', refer to the “whole string” rather than the (Emacs) “buffer”.

0 files changed, 0 insertions, 0 deletions