sre 2.1b2 update:

- take locale into account for word boundary anchors (#410271)
- restored 2.0's *? behaviour (#233283, #408936 and others)
- speed up re.sub/re.subn
diff --git a/Lib/test/re_tests.py b/Lib/test/re_tests.py
index aacd916..7c5dc89 100755
--- a/Lib/test/re_tests.py
+++ b/Lib/test/re_tests.py
@@ -639,3 +639,14 @@
     # bug 130748: ^* should be an error (nothing to repeat)
     (r'^*', '', SYNTAX_ERROR),
 ]
+
+try:
+    u = eval("u'\N{LATIN CAPITAL LETTER A WITH DIAERESIS}'")
+except SyntaxError:
+    pass
+else:
+    tests.extend([
+    # bug 410271: \b broken under locales
+    (r'\b.\b', 'a', SUCCEED, 'found', 'a'),
+    (r'(?u)\b.\b', u, SUCCEED, 'found', u),
+    ])