tests: require SQLite 3.8.3+ as sqlitestore relies on "WITH" clause
The test fails on gcc112 because the SQLite is too old.
https://sqlite.org/changes.html#version_3_8_3
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.