[3.7] bpo-33475: Fix and improve converting annotations to strings. (GH-6774). (GH-6927)

(cherry picked from commit 64fddc423fcbe90b8088446c63385ec0aaf3077c)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Python/compile.c b/Python/compile.c
index 62d7886..c38a0d1 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1705,7 +1705,7 @@
 compiler_visit_annexpr(struct compiler *c, expr_ty annotation)
 {
     PyObject *ann_as_str;
-    ann_as_str = _PyAST_ExprAsUnicode(annotation, 1);
+    ann_as_str = _PyAST_ExprAsUnicode(annotation);
     if (!ann_as_str) {
         return 0;
     }