mercurial/help/common.txt

templates: use CSS classes for diff styling

Use of inline style for diff styling led to significant browser memory
usage on large diffs. Moving the styling into CSS classes corrects this.

This patch is based on work from
https://bugzilla.mozilla.org/show_bug.cgi?id=766952
and
https://hg.mozilla.org/hgcustom/version-control-tools/rev/2c355a580af6

.. Common link and substitution definitions.

.. |hg(1)| replace:: **hg**\ (1)
.. _hg(1): hg.1.html
.. |hgrc(5)| replace:: **hgrc**\ (5)
.. _hgrc(5): hgrc.5.html
.. |hgignore(5)| replace:: **hgignore**\ (5)
.. _hgignore(5): hgignore.5.html