Adrián Pérez de Castro authored Feb 03, 2017 and Michael Catanzaro committed Feb 03, 2017

This adds a few more cases to the escaping done when converting an AdBlock
non-regepx "simple pattern" from a rule into a GRegex. This patch does the
following:

- Adds escaping to some of the regexp metacharacters which were not being
  handled: (){}+.|\
- Adds support for using a vertical bar at the end of a pattern to anchor the
  match at the end.
- Adds support for using ^ to match a "separator character" (a non-letter,
  non-number, or one of _-.%).

This also adds as much comment lines as code, which in this particular case
is probably a good thing, so reading the code in the future does not need
checking each case against the GRegex documentation.

https://bugzilla.gnome.org/show_bug.cgi?id=777714