Bug 1073409 - Only display first line of each commit message

To make the list of commit messages shown for each push less cluttered.
In the future, bug 1061283 will change the API so that there are
separate fields for the first line and full comment message strings, so
at that point we'll switch to using those instead.

ui/js/directives/clonejobs.js

@@ -330,7 +330,8 @@ treeherder.directive('thCloneJobs', [
                     revision.email = userTokens[1];
                 }
                 revision.name = userTokens[0].trim();
-                revision.escaped_comment = _.escape(revision.comments);
+                // Only use the first line of the full commit message.
+                revision.escaped_comment = _.escape(revision.comments.split('\n')[0]);
                 revision.escaped_comment_linkified = linkifyBugsFilter(revision.escaped_comment);
                 revisionHtml = revisionInterpolator(revision);
                 ulEl.append(revisionHtml);