documentation error in m4 online help

[Bob Badour]

In the section on regular expressions, the link to the emacs
documentation for the regular expression syntax is bad.

Where you have the relative url in the href at
<a href="emacs.html#Regexps">Syntax of Regular Expressions</a>

You need to have the absolute url
http://www.gnu.org/software/emacs/manual/emacs.html#Regexps instead:
<a
href="http://www.gnu.org/software/emacs/manual/emacs.html#Regexps";>Syntax
of Regular Expressions</a>

Currently, it link gets a 404 trying to load a page at
http://www.gnu.org/software/m4/manual/emacs.html#Regexps


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