Change a very minor inconsistency (that is purely cosmetic) in the AST
definition.
diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index 00de381..3aaa0f2 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -75,7 +75,7 @@
| Subscript(expr value, slice slice, expr_context ctx)
| Name(identifier id, expr_context ctx)
| List(expr* elts, expr_context ctx)
- | Tuple(expr *elts, expr_context ctx)
+ | Tuple(expr* elts, expr_context ctx)
-- col_offset is the byte offset in the utf8 string the parser uses
attributes (int lineno, int col_offset)