[codemod] Fix non-matching bracket pairs (GH-28473)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>

Objects/unicodeobject.c

@@ -10747,7 +10747,7 @@ replace(PyObject *self, PyObject *str1,
             release1 = 1;
         }
         /* new_size = PyUnicode_GET_LENGTH(self) + n * (PyUnicode_GET_LENGTH(str2) -
-           PyUnicode_GET_LENGTH(str1))); */
+           PyUnicode_GET_LENGTH(str1)); */
         if (len1 < len2 && len2 - len1 > (PY_SSIZE_T_MAX - slen) / n) {
                 PyErr_SetString(PyExc_OverflowError,
                                 "replace string is too long");