# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 2017-03-15 06:48:25
# Node ID dddc4812aa7aff48b97e2697bac914b1d8c4036a
# Parent  6e3c79bc9a35131a5362e8a0e9000c89955dd883

hgk: don't use mutable default argument value

Caught by pylint.

diff --git a/hgext/hgk.py b/hgext/hgk.py
--- a/hgext/hgk.py
+++ b/hgext/hgk.py
@@ -71,8 +71,10 @@ testedwith = 'ships-with-hg-core'
     inferrepo=True)
 def difftree(ui, repo, node1=None, node2=None, *files, **opts):
     """diff trees from two commits"""
-    def __difftree(repo, node1, node2, files=[]):
+    def __difftree(repo, node1, node2, files=None):
         assert node2 is not None
+        if files is None:
+            files = []
         mmap = repo[node1].manifest()
         mmap2 = repo[node2].manifest()
         m = scmutil.match(repo[node1], files)