Issue #24791: Fix grammar regression for call syntax: 'g(*a or b)'.
diff --git a/Grammar/Grammar b/Grammar/Grammar
index 86ec432..99fcea0 100644
--- a/Grammar/Grammar
+++ b/Grammar/Grammar
@@ -137,7 +137,7 @@
 argument: ( test [comp_for] |
             test '=' test |
             '**' test |
-            star_expr )
+            '*' test )
 
 comp_iter: comp_for | comp_if
 comp_for: 'for' exprlist 'in' or_test [comp_iter]