From: Łukasz Langa <lukasz@langa.pl>
Date: Sun, 10 Jun 2018 02:49:20 +0000 (-0700)
Subject: Don't mark subtrees as changed that were already marked.
X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/2cc42f78929ba1815853be181d3b16da7c05f811?hp=2228890d6210e10d9ea3c24cb123a4d6b47f36b9

Don't mark subtrees as changed that were already marked.
---

diff --git a/blib2to3/pytree.py b/blib2to3/pytree.py
index b24866e..61df2b6 100644
--- a/blib2to3/pytree.py
+++ b/blib2to3/pytree.py
@@ -132,6 +132,8 @@ class Base(object):
         return node.lineno
 
     def changed(self):
+        if self.was_changed:
+            return
         if self.parent:
             self.parent.changed()
         self.was_changed = True