# HG changeset patch
# User Denis Laxalde <denis.laxalde@logilab.fr>
# Date 1528278975 -7200
# Node ID 4d8268ef1fb713f793508d73fef19cb40986adba
# Parent  aa999699e5047da7512ececd8ead42a2f1b15e4b
[py3] Decode subprocess stdout in toolsutils.show_diffs()

On Python 3, subprocess' pipes are bytes stream so we must decode them
before printing. Without this change, diff of configuration files (e.g.
all-in-one.conf as displayed upon instance upgrade) will rendered as a
single line on Python 3.

diff -r aa999699e504 -r 4d8268ef1fb7 cubicweb/toolsutils.py
--- a/cubicweb/toolsutils.py	Thu May 03 16:47:51 2018 +0200
+++ b/cubicweb/toolsutils.py	Wed Jun 06 11:56:15 2018 +0200
@@ -96,7 +96,7 @@
     """
     import shutil
     pipe = subprocess.Popen(['diff', '-u', appl_file, ref_file], stdout=subprocess.PIPE)
-    diffs = pipe.stdout.read()
+    diffs = pipe.stdout.read().decode('utf-8')
     if diffs:
         if askconfirm:
             print()