githelp: clean up reflog help
This referenced commands that don't exist in core. The new help
isn't great since it references an experimental extension. But
it is better than nothing.
While we're here, also add test coverage.
Differential Revision: https://phab.mercurial-scm.org/D1727
#!/bin/sh
HGENCODING=UTF-8
export HGENCODING
echo ".. -*- coding: utf-8 -*-" > gendoc.txt
echo "" >> gendoc.txt
LANGUAGE=$1 python "$TESTDIR/../doc/gendoc.py" >> gendoc.txt 2> /dev/null || exit
echo "checking for parse errors"
python "$TESTDIR/../doc/docchecker" gendoc.txt
python "$TESTDIR/../doc/runrst" html gendoc.txt /dev/null