Ticket #2208: filter-arg-emptystring.diff

django/template/__init__.py

@@ -531 +531 @@
                 constant_arg, i18n_arg, var_arg = match.group("constant_arg", "i18n_arg", "var_arg")
                 if i18n_arg:
                     args.append((False, _(i18n_arg.replace(r'\"', '"'))))
-                elif constant_arg:
+                elif constant_arg or constant_arg != None:
                     args.append((False, constant_arg.replace(r'\"', '"')))
                 elif var_arg:
                     args.append((True, var_arg))