linelog: suppress annoying pytype warning about an ignored metaclass
This isn't actively hurting us right now, and it's not trivial to set
up this metaclass correctly on both Python 2 and Python 3 without
dragging in all of `six`, but we still get lots of typechecking
goodness with this error suppressed.
Differential Revision: https://phab.mercurial-scm.org/D7270
Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:
http://docutils.sourceforge.net/rst.html
It's also convertible to a variety of other formats including standard
UNIX man page format and HTML. You'll need to install Docutils:
http://docutils.sourceforge.net/
Use the Makefile in this directory to generate the man and HTML pages.