gh-101372: Fix unicodedata.is_normalized to properly handle the UCD 3… (gh-101388)

(cherry picked from commit 9ef7e75)

Co-authored-by: Dong-hee Na <[email protected]>

Author: miss-islington

Misc/NEWS.d/next/Core and Builtins/2023-01-28-20-31-42.gh-issue-101372.8BcpCC.rst

@@ -0,0 +1,2 @@
+Fix :func:`~unicodedata.is_normalized` to properly handle the UCD 3.2.0
+cases. Patch by Dong-hee Na.

Modules/unicodedata.c

@@ -805,7 +805,7 @@ is_normalized_quickcheck(PyObject *self, PyObject *input, bool nfc, bool k,
 {
     /* UCD 3.2.0 is requested, quickchecks must be disabled. */
     if (UCD_Check(self)) {
-        return NO;
+        return MAYBE;
     }
 
     Py_ssize_t i, len;