churn: lowercase message

hgext/churn.py

@@ -69,7 +69,7 b' def countrate(ui, repo, amap, *pats, **o'
         else:
             parents = ctx.parents()
             if len(parents) > 1:
-                ui.note(_('Revision %d is a merge, ignoring...\n') % (rev,))
+                ui.note(_('revision %d is a merge, ignoring...\n') % (rev,))
                 return
 
             ctx1 = parents[0]