The comment in ast_for_namedexpr shouldn't include if_stmt (GH-17586)


Automerge-Triggered-By: @gvanrossum
(cherry picked from commit b08d3f71beab59653edfbbcf7b92a7bc8050d6b8)

Co-authored-by: Guido van Rossum <guido@python.org>
diff --git a/Python/ast.c b/Python/ast.c
index 95caeff..7081394 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -1935,9 +1935,7 @@
 static expr_ty
 ast_for_namedexpr(struct compiling *c, const node *n)
 {
-    /* if_stmt: 'if' namedexpr_test ':' suite ('elif' namedexpr_test ':' suite)*
-         ['else' ':' suite]
-       namedexpr_test: test [':=' test]
+    /* namedexpr_test: test [':=' test]
        argument: ( test [comp_for] |
             test ':=' test |
             test '=' test |