Use possesive quantifier for optimization.

Author: serhiy-storchaka

Lib/xml/utils.py

@@ -21,5 +21,5 @@ def is_valid_name(name):
             '\u200C\u200D\u203F\u2040'
             '\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF'
             '\uF900-\uFDCF\uFDF0-\uFFFD\U00010000-\U000EFFFF'
-        ']*',
+        ']*+',
         name) is not None