py3: have bytes version of sys.executable
sys.executable on Python 3 returns unicodes and we want bytes. So this patch
adds a new pycompat.sysexecutable which returns bytes by encoding using
os.fsencode() since it is path variable.
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.