Wrap commit message in EmailsOnPush email.

See #1867.

app/views/layouts/notify.html.haml

@@ -16,6 +16,9 @@
       font-size:small;
       color:#777
     }
+    pre.commit-message {
+      white-space: pre-wrap;
+    }
     .file-stats a {
       text-decoration: none;
     }

app/views/notify/repository_push_email.html.haml

@@ -9,7 +9,8 @@
       %div
         %span by #{commit.author_name}
         %i at #{commit.committed_date.strftime("%Y-%m-%dT%H:%M:%SZ")}
-      %pre #{commit.safe_message}
+      %pre.commit-message 
+        = commit.safe_message
 
 %h4 #{pluralize @diffs.count, "changed file"}: