Issue #12541: Be lenient with quotes around Realm field of HTTP Basic Authentation in urllib2.

 G: changed Misc/NEWS
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index fe2cfcd..cbcbe1a 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -794,7 +794,7 @@
     # allow for double- and single-quoted realm values
     # (single quotes are a violation of the RFC, but appear in the wild)
     rx = re.compile('(?:.*,)*[ \t]*([^ \t]+)[ \t]+'
-                    'realm=(["\'])(.*?)\\2', re.I)
+                    'realm=(["\']?)([^"\']*)\\2', re.I)
 
     # XXX could pre-emptively send auth info already accepted (RFC 2617,
     # end of section 2, and section 1.2 immediately after "credentials"