match: remove a mutable default argument
Mutable default arguments are know to the state of California to cause bugs.
--- a/mercurial/scmutil.py Thu Sep 24 01:58:33 2015 -0700
+++ b/mercurial/scmutil.py Thu Sep 24 00:59:26 2015 -0700
@@ -753,7 +753,7 @@
ret.append(kindpat)
return ret
-def matchandpats(ctx, pats=[], opts={}, globbed=False, default='relpath',
+def matchandpats(ctx, pats=(), opts={}, globbed=False, default='relpath',
badfn=None):
'''Return a matcher and the patterns that were used.
The matcher will warn about bad matches, unless an alternate badfn callback