# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1571321166 -7200
# Node ID f0a2c1972e817707f06fc951103ae6090d91b279
# Parent  90213d027154f9154f3704e9bf42e15e22bcd215
copies: simplify chain loop

This is a mostly gratuitous change to make the code more direct.

Differential Revision: https://phab.mercurial-scm.org/D7131

diff -r 90213d027154 -r f0a2c1972e81 mercurial/copies.py
--- a/mercurial/copies.py	Thu Oct 17 02:17:24 2019 +0200
+++ b/mercurial/copies.py	Thu Oct 17 16:06:06 2019 +0200
@@ -67,10 +67,7 @@
     """chain two sets of copies 'a' and 'b'"""
     t = a.copy()
     for k, v in pycompat.iteritems(b):
-        if v in t:
-            t[k] = t[v]
-        else:
-            t[k] = v
+        t[k] = t.get(v, v)
     return t