Add trailing comma to disabled list

Author: grantjenks

.pylintrc

@@ -137,7 +137,7 @@ disable=print-statement,
         super-init-not-called,
         ungrouped-imports,
         no-else-return,
-        useless-object-inheritance
+        useless-object-inheritance,
 
 # Enable the message, report, category or checker with the given id(s). You can
 # either give multiple identifier separated by comma (,) or put this option