# HG changeset patch
# User Benoit Boissinot <benoit.boissinot@ens-lyon.org>
# Date 2008-09-02 15:32:07
# Node ID 8c136043867b6e40ec285f65d6fb7051ce185d31
# Parent  63d1d3e489f88bea65b3e90404f678d73b6575dc

dirstate: explain why appending instead of os.path.join() is safe

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -101,6 +101,7 @@ class dirstate(object):
 
     def _join(self, f):
         # much faster than os.path.join()
+        # it's safe because f is always a relative path
         return self._rootdir + f
 
     def flagfunc(self, fallback):