gitweb: use monospace font for commit messages Commit messages often contain vertically aligned text. The default paper style already uses monospace fonts for rendering commit messages. And, AFAICT, a number of Git servers also render commit messages with monospace. It seems like the reasonable thing to do. This commit converts all instances of the full commit message in the gitweb style to render with monospace.

--- a/mercurial/templates/gitweb/changeset.tmpl	Fri Mar 24 22:40:08 2017 -0400
+++ b/mercurial/templates/gitweb/changeset.tmpl	Fri Mar 24 19:52:43 2017 -0700
@@ -43,7 +43,7 @@
 {child%changesetchild}
 </table></div>
 
-<div class="page_body">
+<div class="page_body description">
 {desc|strip|escape|websub|addbreaks|nonempty}
 </div>
 <div class="list_head"></div>