py3: add a missing b'' in tests/bruterebase.py

Differential Revision: https://phab.mercurial-scm.org/D2503

tests/bruterebase.py

@@ -1,74 +1,74
 # bruterebase.py - brute force rebase testing
 #
 # Copyright 2017 Facebook, Inc.
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 from __future__ import absolute_import
 
 from mercurial import (
     error,
     registrar,
     revsetlang,
 )
 
 from hgext import rebase
 
 try:
     xrange
 except NameError:
     xrange = range
 
 cmdtable = {}
 command = registrar.command(cmdtable)
 
 @command(b'debugbruterebase')
 def debugbruterebase(ui, repo, source, dest):
     """for every non-empty subset of source, run rebase -r subset -d dest
 
     Print one line summary for each subset. Assume obsstore is enabled.
     """
     srevs = list(repo.revs(source))
 
     with repo.wlock(), repo.lock():
         repolen = len(repo)
         cl = repo.changelog
 
         def getdesc(rev):
             result = cl.changelogrevision(rev).description
             if rev >= repolen:
                 result += b"'"
             return result
 
         for i in xrange(1, 2 ** len(srevs)):
             subset = [rev for j, rev in enumerate(srevs) if i & (1 << j) != 0]
             spec = revsetlang.formatspec(b'%ld', subset)
             tr = repo.transaction(b'rebase')
             tr.report = lambda x: 0 # hide "transaction abort"
 
             ui.pushbuffer()
             try:
                 rebase.rebase(ui, repo, dest=dest, rev=[spec])
             except error.Abort as ex:
                 summary = b'ABORT: %s' % ex
             except Exception as ex:
                 summary = b'CRASH: %s' % ex
             else:
                 # short summary about new nodes
                 cl = repo.changelog
                 descs = []
                 for rev in xrange(repolen, len(repo)):
                     desc = b'%s:' % getdesc(rev)
                     for prev in cl.parentrevs(rev):
                         if prev > -1:
                             desc += getdesc(prev)
                     descs.append(desc)
                 descs.sort()
-                summary = ' '.join(descs)
+                summary = b' '.join(descs)
             ui.popbuffer()
             repo.vfs.tryunlink(b'rebasestate')
 
             subsetdesc = b''.join(getdesc(rev) for rev in subset)
             ui.write((b'%s: %s\n') % (subsetdesc.rjust(len(srevs)), summary))
             tr.abort()