tree 7f0b682a5b5629bef4cae850dd078b11aef51469
parent 2962ec29c7a1cb65e7ef1a6acdcfa613bf11db3c
author Wyatt Allen <wyatta@google.com> 1472838965 -0700
committer Wyatt Allen <wyatta@google.com> 1473980631 -0700

Upgrade most change emails with HTML

Add HTML templates for change emails which do not require additional
template data to be provided in order for it to be formatted in HTML.
Introduces a HeaderHtml template counterpart to FooterHtml.

In this change, there are minimal visual deviations from the plain-text
emails. URLs are added as anchor tags. Commit messages, diffs and "cover
letter"s are set in PRE tags to preserve whitespace and to use monospace
fonts. HR tags are used instead of the text-based horizontal rules in
the text emails.

Change email types upgraded with this change:

* Abandon Change
* Delete Reviewer
* Delete Vote
* New Change
* New Patch Set
* Restore Change
* Revert Change

Change-Id: Ic1171d6288335aa69e12f076558e861934bfa150