patch: move yielding "\n" to the end of loop
The original logic makes it harder to reason about - it yields the "\n"
character belonging to the last line in the next loop iteration.
The new code is in theory a little bit slower. But is more readable. It
makes the following changes easier to read.
Differential Revision: https://phab.mercurial-scm.org/D3210
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.