tests: update duplicateoptions test to use bytestrings everywhere

Test now passes on Python 3.

Differential Revision: https://phab.mercurial-scm.org/D297

tests/test-duplicateoptions.py

@@ -1,41 +1,41 b''
 from __future__ import absolute_import, print_function
 import os
 from mercurial import (
     commands,
     extensions,
     ui as uimod,
 )
 
-ignore = {'highlight', 'win32text', 'factotum'}
+ignore = {b'highlight', b'win32text', b'factotum'}
 
 if os.name != 'nt':
-    ignore.add('win32mbcs')
+    ignore.add(b'win32mbcs')
 
 disabled = [ext for ext in extensions.disabled().keys() if ext not in ignore]
 
-hgrc = open(os.environ["HGRCPATH"], 'w')
-hgrc.write('[extensions]\n')
+hgrc = open(os.environ["HGRCPATH"], 'wb')
+hgrc.write(b'[extensions]\n')
 
 for ext in disabled:
-    hgrc.write(ext + '=\n')
+    hgrc.write(ext + b'=\n')
 
 hgrc.close()
 
 u = uimod.ui.load()
 extensions.loadall(u)
 
 globalshort = set()
 globallong = set()
 for option in commands.globalopts:
     option[0] and globalshort.add(option[0])
     option[1] and globallong.add(option[1])
 
-for cmd, entry in commands.table.iteritems():
+for cmd, entry in commands.table.items():
     seenshort = globalshort.copy()
     seenlong = globallong.copy()
     for option in entry[1]:
         if (option[0] and option[0] in seenshort) or \
            (option[1] and option[1] in seenlong):
             print("command '" + cmd + "' has duplicate option " + str(option))
         seenshort.add(option[0])
         seenlong.add(option[1])