OK, ready to make 'assert' a keyword (instead of '__assert__').
diff --git a/Grammar/Grammar b/Grammar/Grammar
index cfaee6d..73c298f 100644
--- a/Grammar/Grammar
+++ b/Grammar/Grammar
@@ -49,7 +49,7 @@
## accesstype should be ('public' | 'protected' | 'private') ['read'] ['write']
## but can't be because that would create undesirable reserved words!
exec_stmt: 'exec' expr ['in' test [',' test]]
-assert_stmt: '__assert__' test [',' test]
+assert_stmt: 'assert' test [',' test]
compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef
if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]