doc/README

upgrade: add '-' in optimization name

The older name `redeltaall` was hard to type and read. The newer form should
be more user-friendly.

We keep backward compatibility with the old form (at least for a while).
Having to use different form depending on the version is very impractical and
error prone.

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.