added = preserve to some pre statements

app/views/errors/gitolite.html.haml

@@ -14,5 +14,6 @@
       %p
         Try:
       %pre
+        = preserve do
           sudo chmod -R 770 /home/git/repositories/
           sudo chown -R git:git /home/git/repositories/

app/views/merge_requests/_how_to_merge.html.haml

@@ -4,6 +4,7 @@
     %h3 How To Merge
   .modal-body
     %pre
+      = preserve do
         :erb
           git checkout <%= @merge_request.target_branch %>
           git fetch origin