# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1443081270 25200
# Node ID e9a35411bbbcf7c09ab002fca424ce982d8b3dc5
# Parent  2449a0a6ebda323da36f260bc52b3636b131cbea
httpconnection: remove a mutable default argument

Mutable default arguments are know to the state of California to cause bugs.

diff -r 2449a0a6ebda -r e9a35411bbbc mercurial/httpconnection.py
--- a/mercurial/httpconnection.py	Thu Sep 24 00:52:21 2015 -0700
+++ b/mercurial/httpconnection.py	Thu Sep 24 00:54:30 2015 -0700
@@ -107,7 +107,9 @@
 
 class HTTPConnection(httpclient.HTTPConnection):
     response_class = HTTPResponse
-    def request(self, method, uri, body=None, headers={}):
+    def request(self, method, uri, body=None, headers=None):
+        if headers is None:
+            headers = {}
         if isinstance(body, httpsendfile):
             body.seek(0)
         httpclient.HTTPConnection.request(self, method, uri, body=body,