bpo-43822: Improve syntax errors for missing commas (GH-25377)

diff --git a/Include/token.h b/Include/token.h
index 9b8a3aa..eb1b9ea 100644
--- a/Include/token.h
+++ b/Include/token.h
@@ -69,8 +69,9 @@ extern "C" {
 #define ASYNC           56
 #define TYPE_IGNORE     57
 #define TYPE_COMMENT    58
-#define ERRORTOKEN      59
-#define N_TOKENS        63
+#define SOFT_KEYWORD    59
+#define ERRORTOKEN      60
+#define N_TOKENS        64
 #define NT_OFFSET       256
 
 /* Special definitions for cooperation with parser */