Merged because
1. it fixes three languages, Asciidoc, Rest (Geanys own documentation) and Latex and progresses the process of making it easier to maintain parsers from upstream.
2. It has been working for me for months
3. If we keep delaying every ctags update for a year we will always have huge updates :(
The downside is it loses Cobol, but that appears to require major work which can be better provided as a pull request on top of this when agreement on either making a non-regex parser or accepting two regex parsers (since ctags uses a different variant to Glib).
Summary: we need to make progress, not block because its not perfect.