templates: reword 'back to filelog' link anchor text
This anchor text is problematic in two ways: first, the "back to" part
assumes that you got to the page showing it via the filelog. This is
not necessarily true, as there are other ways to get to that view
besides the filelog view, such as for example following the history of
lines from a file. Second, it uses "filelog" jargon, which refers to
how each file has its own revlog. This is internal jargon that has no
business being exposed to the end user.
I just reworded this template to improve understanding.
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.