check-code: drop the 'isdisjoint' ban
'isdisjoint' is available in Python 2.6. The new lowest supported version.
--- a/contrib/check-code.py Sun May 17 17:40:26 2015 -0700
+++ b/contrib/check-code.py Sun May 17 17:45:47 2015 -0700
@@ -245,7 +245,6 @@
# (r'^\s*print\s+', "avoid using print in core and extensions"),
(r'[\x80-\xff]', "non-ASCII character literal"),
(r'("\')\.format\(', "str.format() not available in Python 2.4"),
- (r'\.isdisjoint\(', "set.isdisjoint not available in Python 2.4"),
(r'(?<!def)\s+(any|all|format)\(',
"any/all/format not available in Python 2.4", 'no-py24'),
(r'if\s.*\selse', "if ... else form not available in Python 2.4"),