Cleanup: remove redundant braces from assert & raise

autopep8 v1.7 added a space after assert & raise,
remove the braces as they aren't needed.

tests/python/bl_run_operators_event_simulate.py

@@ -461,7 +461,7 @@ class BlenderAction(argparse.Action):
         except ArgumentTypeError as ex:
             raise ArgumentTypeError("Invalid 'action' arguments \"%s\" at index %d, %s" % (value, index, str(ex)))
         # Validation should never yield any events.
-        assert(not dummy_result)
+        assert not dummy_result
 
         return (op, args, kwargs)