OK, ready to make 'assert' a keyword (instead of '__assert__').

Grammar/Grammar

@@ -49,7 +49,7 @@ global_stmt: 'global' NAME (',' NAME)*
 ## 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]

Python/graminit.c

@@ -1377,7 +1377,7 @@ static label labels[124] = {
 	{1, "exec"},
 	{293, 0},
 	{1, "in"},
-	{1, "__assert__"},
+	{1, "assert"},
 	{282, 0},
 	{283, 0},
 	{284, 0},