bpo-35766: Merge typed_ast back into CPython (GH-11645)

diff --git a/Grammar/Tokens b/Grammar/Tokens
index f6f303b..1d45e05 100644
--- a/Grammar/Tokens
+++ b/Grammar/Tokens
@@ -55,6 +55,8 @@
 COLONEQUAL              ':='
 
 OP
+TYPE_IGNORE
+TYPE_COMMENT
 ERRORTOKEN
 
 # These aren't used by the C tokenizer but are needed for tokenize.py