From a07a352d1ca37bdf0f52f4547ad2a67be23f4eef Mon Sep 17 00:00:00 2001
From: udf <tabhooked@gmail.com>
Date: Sun, 10 Jun 2018 21:10:48 +0200
Subject: [PATCH] use None as default parameter instead of empty list

---
 stdplugins/markdown.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdplugins/markdown.py b/stdplugins/markdown.py
index 50d69f9..976c936 100644
--- a/stdplugins/markdown.py
+++ b/stdplugins/markdown.py
@@ -70,9 +70,9 @@ MATCHERS = [
 ]
 
 
-def parse(message, old_entities=[]):
+def parse(message, old_entities=None):
     entities = []
-    old_entities = {e.offset: e for e in old_entities}
+    old_entities = {e.offset: e for e in old_entities or []}
 
     i = 0
     message = _add_surrogate(message)