# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 1518387910 28800
# Node ID 1407c42b302cfb9dc65fbf3367d580bc291b207c
# Parent  a5cf79755eff37cb70d24a24a35a18c8866fb385
py3: pass system string to email.message.Message.set_type()

Python 3 insists the type is a str.

Differential Revision: https://phab.mercurial-scm.org/D2149

diff -r a5cf79755eff -r 1407c42b302c mercurial/mail.py
--- a/mercurial/mail.py	Sun Feb 11 14:18:27 2018 -0800
+++ b/mercurial/mail.py	Sun Feb 11 14:25:10 2018 -0800
@@ -20,6 +20,7 @@
 from . import (
     encoding,
     error,
+    pycompat,
     sslutil,
     util,
 )
@@ -218,7 +219,7 @@
     '''
     cs = email.charset.Charset(charset)
     msg = email.message.Message()
-    msg.set_type('text/' + subtype)
+    msg.set_type(pycompat.sysstr('text/' + subtype))
 
     for line in body.splitlines():
         if len(line) > 950: