ArchWiki style linter

[lahwaacz]

Many of the rules from Help:Style could be checked automatically. Implementation should be done in multiple phases, which correspond to different operating modes of the final script:

1. Implement detection of some rules, print warnings to the output.
2. The most trivial problems can be fixed automatically with appropriate edit summary, e.g. fixing capitalization of templates, spacing, replacing external links with Pkg, AUR and Bug templates, replacing code tags with ic and bc templates etc.
3. For complex/context sensitive rules, suggestions could be generated for the user to decide. This depends on hunk-based interactive editing #13.

[lahwaacz]

See also:

• Fix more common html tags kynikos/wiki-monkey#42
• Simulate common fixes in diff pages kynikos/wiki-monkey#46
• Warn about common mistakes kynikos/wiki-monkey#47
• Special problems kynikos/wiki-monkey#72
• Warn about or fix articles belonging to a category and one of its ancestors kynikos/wiki-monkey#110

For issues not related to the current page it would be useful to provide automatic report tool, exploiting the idea from #23.