hgweb: explicitly tests for None in webutil
Changeset d2878bec55bd removed the mutable default value, but did not explicitly
tested for None. Such implicit testing can introduce semantic and performance
issue. We move to an explicit testing for None as recommended by PEP8:
https://www.python.org/dev/peps/pep-0008/#programming-recommendations
--- a/mercurial/hgweb/webutil.py Wed Mar 15 15:08:45 2017 -0700
+++ b/mercurial/hgweb/webutil.py Wed Mar 15 15:10:09 2017 -0700
@@ -143,7 +143,9 @@
class _siblings(object):
def __init__(self, siblings=None, hiderev=None):
- self.siblings = [s for s in siblings or [] if s.node() != nullid]
+ if siblings is None:
+ siblings = []
+ self.siblings = [s for s in siblings if s.node() != nullid]
if len(self.siblings) == 1 and self.siblings[0].rev() == hiderev:
self.siblings = []