Scan of regexp mistakes

[Mattias Engdegård]

Here is a sweep of potential mistakes in regexp strings in elisp code in the 
Emacs tree: obsolete syntax, questionable constructs, and so on.

Most of the warnings are harmless, but some look like outright bugs. Perhaps 
those with knowledge of the code would be interested in taking a look. Some of 
the cases are quite entertaining.

The errors were gathered by the rather hacky trawl.el, attached (in case you 
want to run it on other code). It only requires xr (1.4 or later). To use, run 
trawl-directory or trawl-file.

trawl.log
Description: Binary data

trawl.el
Description: Binary data