--- a/mercurial/bundle2.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/bundle2.py	Thu Apr 09 16:25:48 2015 -0400
@@ -358,7 +358,7 @@
             if output is not None:
                 output = op.ui.popbuffer()
         if output:
-            outpart = op.reply.newpart('b2x:output', data=output,
+            outpart = op.reply.newpart('output', data=output,
                                        mandatory=False)
             outpart.addparam('in-reply-to', str(part.id), mandatory=False)
     finally:
@@ -408,7 +408,7 @@
     populate it. Then call `getchunks` to retrieve all the binary chunks of
     data that compose the bundle2 container."""
 
-    _magicstring = 'HG2Y'
+    _magicstring = 'HG20'
 
     def __init__(self, ui, capabilities=()):
         self.ui = ui
@@ -616,7 +616,7 @@
     def compressed(self):
         return False
 
-formatmap = {'2Y': unbundle20}
+formatmap = {'20': unbundle20}
 
 class bundlepart(object):
     """A bundle2 part contains application level payload
@@ -734,7 +734,7 @@
             # backup exception data for later
             exc_info = sys.exc_info()
             msg = 'unexpected error: %s' % exc
-            interpart = bundlepart('b2x:error:abort', [('message', msg)],
+            interpart = bundlepart('error:abort', [('message', msg)],
                                    mandatory=False)
             interpart.id = 0
             yield _pack(_fpayloadsize, -1)
@@ -982,11 +982,11 @@
                 raise util.Abort(_('Seek failed\n'))
             self._pos = newpos
 
-capabilities = {'HG2Y': (),
-                'b2x:listkeys': (),
-                'b2x:pushkey': (),
+capabilities = {'HG20': (),
+                'listkeys': (),
+                'pushkey': (),
                 'digests': tuple(sorted(util.DIGESTS.keys())),
-                'b2x:remote-changegroup': ('http', 'https'),
+                'remote-changegroup': ('http', 'https'),
                }
 
 def getrepocaps(repo, allowpushback=False):
@@ -995,29 +995,29 @@
     Exists to allow extensions (like evolution) to mutate the capabilities.
     """
     caps = capabilities.copy()
-    caps['b2x:changegroup'] = tuple(sorted(changegroup.packermap.keys()))
+    caps['changegroup'] = tuple(sorted(changegroup.packermap.keys()))
     if obsolete.isenabled(repo, obsolete.exchangeopt):
         supportedformat = tuple('V%i' % v for v in obsolete.formats)
-        caps['b2x:obsmarkers'] = supportedformat
+        caps['obsmarkers'] = supportedformat
     if allowpushback:
-        caps['b2x:pushback'] = ()
+        caps['pushback'] = ()
     return caps
 
 def bundle2caps(remote):
     """return the bundle capabilities of a peer as dict"""
-    raw = remote.capable('bundle2-exp')
+    raw = remote.capable('bundle2')
     if not raw and raw != '':
         return {}
-    capsblob = urllib.unquote(remote.capable('bundle2-exp'))
+    capsblob = urllib.unquote(remote.capable('bundle2'))
     return decodecaps(capsblob)
 
 def obsmarkersversion(caps):
     """extract the list of supported obsmarkers versions from a bundle2caps dict
     """
-    obscaps = caps.get('b2x:obsmarkers', ())
+    obscaps = caps.get('obsmarkers', ())
     return [int(c[1:]) for c in obscaps if c.startswith('V')]
 
-@parthandler('b2x:changegroup', ('version',))
+@parthandler('changegroup', ('version',))
 def handlechangegroup(op, inpart):
     """apply a changegroup part on the repo
 
@@ -1041,14 +1041,14 @@
     if op.reply is not None:
         # This is definitely not the final form of this
         # return. But one need to start somewhere.
-        part = op.reply.newpart('b2x:reply:changegroup', mandatory=False)
+        part = op.reply.newpart('reply:changegroup', mandatory=False)
         part.addparam('in-reply-to', str(inpart.id), mandatory=False)
         part.addparam('return', '%i' % ret, mandatory=False)
     assert not inpart.read()
 
 _remotechangegroupparams = tuple(['url', 'size', 'digests'] +
     ['digest:%s' % k for k in util.DIGESTS.keys()])
-@parthandler('b2x:remote-changegroup', _remotechangegroupparams)
+@parthandler('remote-changegroup', _remotechangegroupparams)
 def handleremotechangegroup(op, inpart):
     """apply a bundle10 on the repo, given an url and validation information
 
@@ -1070,7 +1070,7 @@
     except KeyError:
         raise util.Abort(_('remote-changegroup: missing "%s" param') % 'url')
     parsed_url = util.url(raw_url)
-    if parsed_url.scheme not in capabilities['b2x:remote-changegroup']:
+    if parsed_url.scheme not in capabilities['remote-changegroup']:
         raise util.Abort(_('remote-changegroup does not support %s urls') %
             parsed_url.scheme)
 
@@ -1110,7 +1110,7 @@
     if op.reply is not None:
         # This is definitely not the final form of this
         # return. But one need to start somewhere.
-        part = op.reply.newpart('b2x:reply:changegroup')
+        part = op.reply.newpart('reply:changegroup')
         part.addparam('in-reply-to', str(inpart.id), mandatory=False)
         part.addparam('return', '%i' % ret, mandatory=False)
     try:
@@ -1120,13 +1120,13 @@
             (util.hidepassword(raw_url), str(e)))
     assert not inpart.read()
 
-@parthandler('b2x:reply:changegroup', ('return', 'in-reply-to'))
+@parthandler('reply:changegroup', ('return', 'in-reply-to'))
 def handlereplychangegroup(op, inpart):
     ret = int(inpart.params['return'])
     replyto = int(inpart.params['in-reply-to'])
     op.records.add('changegroup', {'return': ret}, replyto)
 
-@parthandler('b2x:check:heads')
+@parthandler('check:heads')
 def handlecheckheads(op, inpart):
     """check that head of the repo did not change
 
@@ -1142,13 +1142,13 @@
         raise error.PushRaced('repository changed while pushing - '
                               'please try again')
 
-@parthandler('b2x:output')
+@parthandler('output')
 def handleoutput(op, inpart):
     """forward output captured on the server to the client"""
     for line in inpart.read().splitlines():
         op.ui.write(('remote: %s\n' % line))
 
-@parthandler('b2x:replycaps')
+@parthandler('replycaps')
 def handlereplycaps(op, inpart):
     """Notify that a reply bundle should be created
 
@@ -1157,12 +1157,12 @@
     if op.reply is None:
         op.reply = bundle20(op.ui, caps)
 
-@parthandler('b2x:error:abort', ('message', 'hint'))
+@parthandler('error:abort', ('message', 'hint'))
 def handlereplycaps(op, inpart):
     """Used to transmit abort error over the wire"""
     raise util.Abort(inpart.params['message'], hint=inpart.params.get('hint'))
 
-@parthandler('b2x:error:unsupportedcontent', ('parttype', 'params'))
+@parthandler('error:unsupportedcontent', ('parttype', 'params'))
 def handlereplycaps(op, inpart):
     """Used to transmit unknown content error over the wire"""
     kwargs = {}
@@ -1175,19 +1175,19 @@
 
     raise error.UnsupportedPartError(**kwargs)
 
-@parthandler('b2x:error:pushraced', ('message',))
+@parthandler('error:pushraced', ('message',))
 def handlereplycaps(op, inpart):
     """Used to transmit push race error over the wire"""
     raise error.ResponseError(_('push failed:'), inpart.params['message'])
 
-@parthandler('b2x:listkeys', ('namespace',))
+@parthandler('listkeys', ('namespace',))
 def handlelistkeys(op, inpart):
     """retrieve pushkey namespace content stored in a bundle2"""
     namespace = inpart.params['namespace']
     r = pushkey.decodekeys(inpart.read())
     op.records.add('listkeys', (namespace, r))
 
-@parthandler('b2x:pushkey', ('namespace', 'key', 'old', 'new'))
+@parthandler('pushkey', ('namespace', 'key', 'old', 'new'))
 def handlepushkey(op, inpart):
     """process a pushkey request"""
     dec = pushkey.decode
@@ -1202,18 +1202,18 @@
               'new': new}
     op.records.add('pushkey', record)
     if op.reply is not None:
-        rpart = op.reply.newpart('b2x:reply:pushkey')
+        rpart = op.reply.newpart('reply:pushkey')
         rpart.addparam('in-reply-to', str(inpart.id), mandatory=False)
         rpart.addparam('return', '%i' % ret, mandatory=False)
 
-@parthandler('b2x:reply:pushkey', ('return', 'in-reply-to'))
+@parthandler('reply:pushkey', ('return', 'in-reply-to'))
 def handlepushkeyreply(op, inpart):
     """retrieve the result of a pushkey request"""
     ret = int(inpart.params['return'])
     partid = int(inpart.params['in-reply-to'])
     op.records.add('pushkey', {'return': ret}, partid)
 
-@parthandler('b2x:obsmarkers')
+@parthandler('obsmarkers')
 def handleobsmarker(op, inpart):
     """add a stream of obsmarkers to the repo"""
     tr = op.gettransaction()
@@ -1222,12 +1222,12 @@
         op.repo.ui.status(_('%i new obsolescence markers\n') % new)
     op.records.add('obsmarkers', {'new': new})
     if op.reply is not None:
-        rpart = op.reply.newpart('b2x:reply:obsmarkers')
+        rpart = op.reply.newpart('reply:obsmarkers')
         rpart.addparam('in-reply-to', str(inpart.id), mandatory=False)
         rpart.addparam('new', '%i' % new, mandatory=False)
 
 
-@parthandler('b2x:reply:obsmarkers', ('new', 'in-reply-to'))
+@parthandler('reply:obsmarkers', ('new', 'in-reply-to'))
 def handlepushkeyreply(op, inpart):
     """retrieve the result of a pushkey request"""
     ret = int(inpart.params['new'])

--- a/mercurial/bundlerepo.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/bundlerepo.py	Thu Apr 09 16:25:48 2015 -0400
@@ -240,7 +240,7 @@
 
         if isinstance(self.bundle, bundle2.unbundle20):
             cgparts = [part for part in self.bundle.iterparts()
-                       if (part.type == 'b2x:changegroup')
+                       if (part.type == 'changegroup')
                        and (part.params.get('version', '01')
                             in changegroup.packermap)]
 

--- a/mercurial/changegroup.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/changegroup.py	Thu Apr 09 16:25:48 2015 -0400
@@ -71,7 +71,7 @@
     "": ("", nocompress), # only when using unbundle on ssh and old http servers
                           # since the unification ssh accepts a header but there
                           # is no capability signaling it.
-    "HG2Y": (), # special-cased below
+    "HG20": (), # special-cased below
     "HG10UN": ("HG10UN", nocompress),
     "HG10BZ": ("HG10", lambda: bz2.BZ2Compressor()),
     "HG10GZ": ("HG10GZ", lambda: zlib.compressobj()),
@@ -102,10 +102,10 @@
             fh = os.fdopen(fd, "wb")
         cleanup = filename
 
-        if bundletype == "HG2Y":
+        if bundletype == "HG20":
             import bundle2
             bundle = bundle2.bundle20(ui)
-            part = bundle.newpart('b2x:changegroup', data=cg.getchunks())
+            part = bundle.newpart('changegroup', data=cg.getchunks())
             part.addparam('version', cg.version)
             z = nocompress()
             chunkiter = bundle.getchunks()

--- a/mercurial/commands.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/commands.py	Thu Apr 09 16:25:48 2015 -0400
@@ -1221,7 +1221,7 @@
     btypes = {'none': 'HG10UN',
               'bzip2': 'HG10BZ',
               'gzip': 'HG10GZ',
-              'bundle2': 'HG2Y'}
+              'bundle2': 'HG20'}
     bundletype = btypes.get(bundletype)
     if bundletype not in changegroup.bundletypes:
         raise util.Abort(_('unknown bundle type specified with --type'))
@@ -1918,7 +1918,7 @@
     ui.write(('Stream params: %s\n' % repr(gen.params)))
     for part in gen.iterparts():
         ui.write('%s -- %r\n' % (part.type, repr(part.params)))
-        if part.type == 'b2x:changegroup':
+        if part.type == 'changegroup':
             version = part.params.get('version', '01')
             cg = changegroup.packermap[version][1](part, 'UN')
             chunkdata = cg.changelogheader()
@@ -2211,7 +2211,7 @@
     btypes = {'none': 'HG10UN',
               'bzip2': 'HG10BZ',
               'gzip': 'HG10GZ',
-              'bundle2': 'HG2Y'}
+              'bundle2': 'HG20'}
     bundletype = btypes.get(bundletype)
     if bundletype not in changegroup.bundletypes:
         raise util.Abort(_('unknown bundle type specified with --type'))

--- a/mercurial/exchange.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/exchange.py	Thu Apr 09 16:25:48 2015 -0400
@@ -49,7 +49,7 @@
         if version is None:
             raise ValueError('bundler do not support common obsmarker format')
         stream = obsolete.encodemarkers(markers, True, version=version)
-        return bundler.newpart('b2x:obsmarkers', data=stream)
+        return bundler.newpart('obsmarkers', data=stream)
     return None
 
 def _canusebundle2(op):
@@ -57,7 +57,7 @@
 
     Feel free to nuke this function when we drop the experimental option"""
     return (op.repo.ui.configbool('experimental', 'bundle2-exp', False)
-            and op.remote.capable('bundle2-exp'))
+            and op.remote.capable('bundle2'))
 
 
 class pushoperation(object):
@@ -459,10 +459,10 @@
                                      pushop.remote,
                                      pushop.outgoing)
     if not pushop.force:
-        bundler.newpart('b2x:check:heads', data=iter(pushop.remoteheads))
+        bundler.newpart('check:heads', data=iter(pushop.remoteheads))
     b2caps = bundle2.bundle2caps(pushop.remote)
     version = None
-    cgversions = b2caps.get('b2x:changegroup')
+    cgversions = b2caps.get('changegroup')
     if not cgversions:  # 3.1 and 3.2 ship with an empty value
         cg = changegroup.getlocalchangegroupraw(pushop.repo, 'push',
                                                 pushop.outgoing)
@@ -474,7 +474,7 @@
         cg = changegroup.getlocalchangegroupraw(pushop.repo, 'push',
                                                 pushop.outgoing,
                                                 version=version)
-    cgpart = bundler.newpart('b2x:changegroup', data=cg)
+    cgpart = bundler.newpart('changegroup', data=cg)
     if version is not None:
         cgpart.addparam('version', version)
     def handlereply(op):
@@ -490,13 +490,13 @@
     if 'phases' in pushop.stepsdone:
         return
     b2caps = bundle2.bundle2caps(pushop.remote)
-    if not 'b2x:pushkey' in b2caps:
+    if not 'pushkey' in b2caps:
         return
     pushop.stepsdone.add('phases')
     part2node = []
     enc = pushkey.encode
     for newremotehead in pushop.outdatedphases:
-        part = bundler.newpart('b2x:pushkey')
+        part = bundler.newpart('pushkey')
         part.addparam('namespace', enc('phases'))
         part.addparam('key', enc(newremotehead.hex()))
         part.addparam('old', enc(str(phases.draft)))
@@ -533,13 +533,13 @@
     if 'bookmarks' in pushop.stepsdone:
         return
     b2caps = bundle2.bundle2caps(pushop.remote)
-    if 'b2x:pushkey' not in b2caps:
+    if 'pushkey' not in b2caps:
         return
     pushop.stepsdone.add('bookmarks')
     part2book = []
     enc = pushkey.encode
     for book, old, new in pushop.outbookmarks:
-        part = bundler.newpart('b2x:pushkey')
+        part = bundler.newpart('pushkey')
         part.addparam('namespace', enc('bookmarks'))
         part.addparam('key', enc(book))
         part.addparam('old', enc(old))
@@ -583,7 +583,7 @@
     # create reply capability
     capsblob = bundle2.encodecaps(bundle2.getrepocaps(pushop.repo,
                                                       allowpushback=pushback))
-    bundler.newpart('b2x:replycaps', data=capsblob)
+    bundler.newpart('replycaps', data=capsblob)
     replyhandlers = []
     for partgenname in b2partsgenorder:
         partgen = b2partsgenmapping[partgenname]
@@ -975,7 +975,7 @@
     kwargs['common'] = pullop.common
     kwargs['heads'] = pullop.heads or pullop.rheads
     kwargs['cg'] = pullop.fetch
-    if 'b2x:listkeys' in remotecaps:
+    if 'listkeys' in remotecaps:
         kwargs['listkeys'] = ['phase', 'bookmarks']
     if not pullop.fetch:
         pullop.repo.ui.status(_("no changes found\n"))
@@ -1128,7 +1128,7 @@
 
 def caps20to10(repo):
     """return a set with appropriate options to use bundle20 during getbundle"""
-    caps = set(['HG2Y'])
+    caps = set(['HG20'])
     capsblob = bundle2.encodecaps(bundle2.getrepocaps(repo))
     caps.add('bundle2=' + urllib.quote(capsblob))
     return caps
@@ -1161,7 +1161,7 @@
               **kwargs):
     """return a full bundle (with potentially multiple kind of parts)
 
-    Could be a bundle HG10 or a bundle HG2Y depending on bundlecaps
+    Could be a bundle HG10 or a bundle HG20 depending on bundlecaps
     passed. For now, the bundle can contain only changegroup, but this will
     changes when more part type will be available for bundle2.
 
@@ -1212,7 +1212,7 @@
     if kwargs.get('cg', True):
         # build changegroup bundle here.
         version = None
-        cgversions = b2caps.get('b2x:changegroup')
+        cgversions = b2caps.get('changegroup')
         if not cgversions:  # 3.1 and 3.2 ship with an empty value
             cg = changegroup.getchangegroupraw(repo, source, heads=heads,
                                                common=common,
@@ -1228,7 +1228,7 @@
                                                version=version)
 
     if cg:
-        part = bundler.newpart('b2x:changegroup', data=cg)
+        part = bundler.newpart('changegroup', data=cg)
         if version is not None:
             part.addparam('version', version)
 
@@ -1238,7 +1238,7 @@
     """add parts containing listkeys namespaces to the requested bundle"""
     listkeys = kwargs.get('listkeys', ())
     for namespace in listkeys:
-        part = bundler.newpart('b2x:listkeys')
+        part = bundler.newpart('listkeys')
         part.addparam('namespace', namespace)
         keys = repo.listkeys(namespace).items()
         part.data = pushkey.encodekeys(keys)
@@ -1288,7 +1288,7 @@
                 tr = repo.transaction('unbundle')
                 tr.hookargs['source'] = source
                 tr.hookargs['url'] = url
-                tr.hookargs['bundle2-exp'] = '1'
+                tr.hookargs['bundle2'] = '1'
                 r = bundle2.processbundle(repo, cg, lambda: tr).reply
                 p = lambda: tr.writepending() and repo.root or ""
                 repo.hook('b2x-pretransactionclose', throw=True, pending=p,

--- a/mercurial/localrepo.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/localrepo.py	Thu Apr 09 16:25:48 2015 -0400
@@ -110,7 +110,7 @@
                   **kwargs):
         cg = exchange.getbundle(self._repo, source, heads=heads,
                                 common=common, bundlecaps=bundlecaps, **kwargs)
-        if bundlecaps is not None and 'HG2Y' in bundlecaps:
+        if bundlecaps is not None and 'HG20' in bundlecaps:
             # When requesting a bundle2, getbundle returns a stream to make the
             # wire level function happier. We need to build a proper object
             # from it in local peer.
@@ -317,7 +317,7 @@
         if self.ui.configbool('experimental', 'bundle2-exp', False):
             caps = set(caps)
             capsblob = bundle2.encodecaps(bundle2.getrepocaps(self))
-            caps.add('bundle2-exp=' + urllib.quote(capsblob))
+            caps.add('bundle2=' + urllib.quote(capsblob))
         return caps
 
     def _applyrequirements(self, requirements):

--- a/mercurial/repair.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/repair.py	Thu Apr 09 16:25:48 2015 -0400
@@ -42,7 +42,7 @@
     name = "%s/%s-%s-%s.hg" % (backupdir, short(node), totalhash[:8], suffix)
 
     if usebundle2:
-        bundletype = "HG2Y"
+        bundletype = "HG20"
     elif compress:
         bundletype = "HG10BZ"
     else:

--- a/mercurial/wireproto.py	Wed Apr 08 09:38:09 2015 -0700
+++ b/mercurial/wireproto.py	Thu Apr 09 16:25:48 2015 -0400
@@ -617,7 +617,7 @@
             caps.append('streamreqs=%s' % ','.join(requiredformats))
     if repo.ui.configbool('experimental', 'bundle2-exp', False):
         capsblob = bundle2.encodecaps(bundle2.getrepocaps(repo))
-        caps.append('bundle2-exp=' + urllib.quote(capsblob))
+        caps.append('bundle2=' + urllib.quote(capsblob))
     caps.append('unbundle=%s' % ','.join(changegroupmod.bundlepriority))
     caps.append('httpheader=1024')
     return caps
@@ -843,7 +843,7 @@
             os.unlink(tempname)
     except error.BundleValueError, exc:
             bundler = bundle2.bundle20(repo.ui)
-            errpart = bundler.newpart('b2x:error:unsupportedcontent')
+            errpart = bundler.newpart('error:unsupportedcontent')
             if exc.parttype is not None:
                 errpart.addparam('parttype', exc.parttype)
             if exc.params:
@@ -860,7 +860,7 @@
             advargs = []
             if inst.hint is not None:
                 advargs.append(('hint', inst.hint))
-            bundler.addpart(bundle2.bundlepart('b2x:error:abort',
+            bundler.addpart(bundle2.bundlepart('error:abort',
                                                manargs, advargs))
             return streamres(bundler.getchunks())
         else:
@@ -869,7 +869,7 @@
     except error.PushRaced, exc:
         if getattr(exc, 'duringunbundle2', False):
             bundler = bundle2.bundle20(repo.ui)
-            bundler.newpart('b2x:error:pushraced', [('message', str(exc))])
+            bundler.newpart('error:pushraced', [('message', str(exc))])
             return streamres(bundler.getchunks())
         else:
             return pusherr(str(exc))

--- a/tests/test-bundle2-exchange.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-bundle2-exchange.t	Thu Apr 09 16:25:48 2015 -0400
@@ -220,7 +220,7 @@
   lock:  free
   wlock: free
   postclose-tip:eea13746799a public book_eea1
-  txnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2-EXP=1 HG_NEW_OBSMARKERS=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_PHASES_MOVED=1 HG_SOURCE=push HG_TXNNAME=unbundle HG_URL=push
+  txnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2=1 HG_NEW_OBSMARKERS=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_PHASES_MOVED=1 HG_SOURCE=push HG_TXNNAME=unbundle HG_URL=push
   remote: adding changesets
   remote: adding manifests
   remote: adding file changes
@@ -310,7 +310,7 @@
   remote: lock:  free
   remote: wlock: free
   remote: postclose-tip:5fddd98957c8 draft book_5fdd
-  remote: txnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2-EXP=1 HG_NEW_OBSMARKERS=1 HG_NODE=5fddd98957c8a54a4d436dfe1da9d87f21a1b97b HG_SOURCE=serve HG_TXNNAME=unbundle HG_URL=remote:ssh:127.0.0.1
+  remote: txnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2=1 HG_NEW_OBSMARKERS=1 HG_NODE=5fddd98957c8a54a4d436dfe1da9d87f21a1b97b HG_SOURCE=serve HG_TXNNAME=unbundle HG_URL=remote:ssh:127.0.0.1
   pre-close-tip:02de42196ebe draft book_02de
   postclose-tip:02de42196ebe draft book_02de
   txnclose hook: HG_SOURCE=push-response HG_TXNNAME=push-response
@@ -426,7 +426,7 @@
   >         bundler.newpart('test:unknown')
   >     if reason == 'race':
   >         # 20 Bytes of crap
-  >         bundler.newpart('b2x:check:heads', data='01234567890123456789')
+  >         bundler.newpart('check:heads', data='01234567890123456789')
   > 
   > @bundle2.parthandler("test:abort")
   > def handleabort(op, part):

--- a/tests/test-bundle2-format.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-bundle2-format.t	Thu Apr 09 16:25:48 2015 -0400
@@ -92,11 +92,11 @@
   > 
   >     if opts['reply']:
   >         capsstring = 'ping-pong\nelephants=babar,celeste\ncity%3D%21=celeste%2Cville'
-  >         bundler.newpart('b2x:replycaps', data=capsstring)
+  >         bundler.newpart('replycaps', data=capsstring)
   > 
   >     if opts['pushrace']:
   >         # also serve to test the assignement of data outside of init
-  >         part = bundler.newpart('b2x:check:heads')
+  >         part = bundler.newpart('check:heads')
   >         part.data = '01234567890123456789'
   > 
   >     revs = opts['rev']
@@ -109,7 +109,7 @@
   >             headcommon  = [c.node() for c in repo.set('parents(%ld) - %ld', revs, revs)]
   >             outgoing = discovery.outgoing(repo.changelog, headcommon, headmissing)
   >             cg = changegroup.getlocalchangegroup(repo, 'test:bundle2', outgoing, None)
-  >             bundler.newpart('b2x:changegroup', data=cg.getchunks(),
+  >             bundler.newpart('changegroup', data=cg.getchunks(),
   >                             mandatory=False)
   > 
   >     if opts['parts']:
@@ -136,7 +136,7 @@
   >        def genraise():
   >            yield 'first line\n'
   >            raise RuntimeError('Someone set up us the bomb!')
-  >        bundler.newpart('b2x:output', data=genraise(), mandatory=False)
+  >        bundler.newpart('output', data=genraise(), mandatory=False)
   > 
   >     if path is None:
   >        file = sys.stdout
@@ -237,7 +237,7 @@
 Test bundling
 
   $ hg bundle2
-  HG2Y\x00\x00\x00\x00\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00\x00 (no-eol) (esc)
 
 Test unbundling
 
@@ -267,7 +267,7 @@
 Test generation simple option
 
   $ hg bundle2 --param 'caution'
-  HG2Y\x00\x00\x00\x07caution\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00\x07caution\x00\x00\x00\x00 (no-eol) (esc)
 
 Test unbundling
 
@@ -279,7 +279,7 @@
 Test generation multiple option
 
   $ hg bundle2 --param 'caution' --param 'meal'
-  HG2Y\x00\x00\x00\x0ccaution meal\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00\x0ccaution meal\x00\x00\x00\x00 (no-eol) (esc)
 
 Test unbundling
 
@@ -295,7 +295,7 @@
 Test generation
 
   $ hg bundle2 --param 'caution' --param 'meal=vegan' --param 'elephants'
-  HG2Y\x00\x00\x00\x1ccaution meal=vegan elephants\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00\x1ccaution meal=vegan elephants\x00\x00\x00\x00 (no-eol) (esc)
 
 Test unbundling
 
@@ -313,7 +313,7 @@
 Test generation
 
   $ hg bundle2 --param 'e|! 7/=babar%#==tutu' --param simple
-  HG2Y\x00\x00\x00)e%7C%21%207/=babar%25%23%3D%3Dtutu simple\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00)e%7C%21%207/=babar%25%23%3D%3Dtutu simple\x00\x00\x00\x00 (no-eol) (esc)
 
 Test unbundling
 
@@ -337,7 +337,7 @@
 bundling debug
 
   $ hg bundle2 --debug --param 'e|! 7/=babar%#==tutu' --param simple ../out.hg2
-  start emission of HG2Y stream
+  start emission of HG20 stream
   bundle parameter: e%7C%21%207/=babar%25%23%3D%3Dtutu simple
   start of parts
   end of bundle
@@ -345,12 +345,12 @@
 file content is ok
 
   $ cat ../out.hg2
-  HG2Y\x00\x00\x00)e%7C%21%207/=babar%25%23%3D%3Dtutu simple\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00)e%7C%21%207/=babar%25%23%3D%3Dtutu simple\x00\x00\x00\x00 (no-eol) (esc)
 
 unbundling debug
 
   $ hg statbundle2 --debug < ../out.hg2
-  start processing of HG2Y stream
+  start processing of HG20 stream
   reading bundle2 stream parameters
   ignoring unknown parameter 'e|! 7/'
   ignoring unknown parameter 'simple'
@@ -384,7 +384,7 @@
 =================
 
   $ hg bundle2 --parts ../parts.hg2 --debug
-  start emission of HG2Y stream
+  start emission of HG20 stream
   bundle parameter: 
   start of parts
   bundle part: "test:empty"
@@ -397,7 +397,7 @@
   end of bundle
 
   $ cat ../parts.hg2
-  HG2Y\x00\x00\x00\x00\x00\x00\x00\x11 (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00\x11 (esc)
   test:empty\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x11 (esc)
   test:empty\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10	test:song\x00\x00\x00\x02\x00\x00\x00\x00\x00\xb2Patali Dirapata, Cromda Cromda Ripalo, Pata Pata, Ko Ko Ko (esc)
   Bokoro Dipoulito, Rondi Rondi Pepino, Pata Pata, Ko Ko Ko
@@ -437,7 +437,7 @@
   parts count:   7
 
   $ hg statbundle2 --debug < ../parts.hg2
-  start processing of HG2Y stream
+  start processing of HG20 stream
   reading bundle2 stream parameters
   options count: 0
   start extraction of bundle2 parts
@@ -516,7 +516,7 @@
 Process the bundle
 
   $ hg unbundle2 --debug < ../parts.hg2
-  start processing of HG2Y stream
+  start processing of HG20 stream
   reading bundle2 stream parameters
   start extraction of bundle2 parts
   part header size: 17
@@ -610,21 +610,18 @@
 The reply is a bundle
 
   $ cat ../reply.hg2
-  HG2Y\x00\x00\x00\x00\x00\x00\x00\x1f (esc)
-  b2x:output\x00\x00\x00\x00\x00\x01\x0b\x01in-reply-to3\x00\x00\x00\xd9The choir starts singing: (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00\x1b\x06output\x00\x00\x00\x00\x00\x01\x0b\x01in-reply-to3\x00\x00\x00\xd9The choir starts singing: (esc)
       Patali Dirapata, Cromda Cromda Ripalo, Pata Pata, Ko Ko Ko
       Bokoro Dipoulito, Rondi Rondi Pepino, Pata Pata, Ko Ko Ko
       Emana Karassoli, Loucra Loucra Ponponto, Pata Pata, Ko Ko Ko.
-  \x00\x00\x00\x00\x00\x00\x00\x1f (esc)
-  b2x:output\x00\x00\x00\x01\x00\x01\x0b\x01in-reply-to4\x00\x00\x00\xc9debugreply: capabilities: (esc)
+  \x00\x00\x00\x00\x00\x00\x00\x1b\x06output\x00\x00\x00\x01\x00\x01\x0b\x01in-reply-to4\x00\x00\x00\xc9debugreply: capabilities: (esc)
   debugreply:     'city=!'
   debugreply:         'celeste,ville'
   debugreply:     'elephants'
   debugreply:         'babar'
   debugreply:         'celeste'
   debugreply:     'ping-pong'
-  \x00\x00\x00\x00\x00\x00\x00\x1e	test:pong\x00\x00\x00\x02\x01\x00\x0b\x01in-reply-to7\x00\x00\x00\x00\x00\x00\x00\x1f (esc)
-  b2x:output\x00\x00\x00\x03\x00\x01\x0b\x01in-reply-to7\x00\x00\x00=received ping request (id 7) (esc)
+  \x00\x00\x00\x00\x00\x00\x00\x1e	test:pong\x00\x00\x00\x02\x01\x00\x0b\x01in-reply-to7\x00\x00\x00\x00\x00\x00\x00\x1b\x06output\x00\x00\x00\x03\x00\x01\x0b\x01in-reply-to7\x00\x00\x00=received ping request (id 7) (esc)
   replying to ping request (id 7)
   \x00\x00\x00\x00\x00\x00\x00\x00 (no-eol) (esc)
 
@@ -632,11 +629,11 @@
 
   $ hg statbundle2 < ../reply.hg2
   options count: 0
-    :b2x:output:
+    :output:
       mandatory: 0
       advisory: 1
       payload: 217 bytes
-    :b2x:output:
+    :output:
       mandatory: 0
       advisory: 1
       payload: 201 bytes
@@ -644,7 +641,7 @@
       mandatory: 1
       advisory: 0
       payload: 0 bytes
-    :b2x:output:
+    :output:
       mandatory: 0
       advisory: 1
       payload: 61 bytes
@@ -714,10 +711,10 @@
   9520eea781bcca16c1e15acc0ba14335a0e8e5ba
   eea13746799a9e0bfd88f29d3c2e9dc9389f524f
   02de42196ebee42ef284b6780a87cdc96e8eaab6
-  start emission of HG2Y stream
+  start emission of HG20 stream
   bundle parameter: 
   start of parts
-  bundle part: "b2x:changegroup"
+  bundle part: "changegroup"
   bundling: 1/4 changesets (25.00%)
   bundling: 2/4 changesets (50.00%)
   bundling: 3/4 changesets (75.00%)
@@ -732,7 +729,7 @@
   end of bundle
 
   $ cat ../rev.hg2
-  HG2Y\x00\x00\x00\x00\x00\x00\x00\x16\x0fb2x:changegroup\x00\x00\x00\x00\x00\x00\x00\x00\x06\x13\x00\x00\x00\xa42\xafv\x86\xd4\x03\xcfE\xb5\xd9_-p\xce\xbe\xa5\x87\xac\x80j_\xdd\xd9\x89W\xc8\xa5JMCm\xfe\x1d\xa9\xd8\x7f!\xa1\xb9{\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x002\xafv\x86\xd4\x03\xcfE\xb5\xd9_-p\xce\xbe\xa5\x87\xac\x80j\x00\x00\x00\x00\x00\x00\x00)\x00\x00\x00)6e1f4c47ecb533ffd0c8e52cdc88afb6cd39e20c (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00\x12\x0bchangegroup\x00\x00\x00\x00\x00\x00\x00\x00\x06\x13\x00\x00\x00\xa42\xafv\x86\xd4\x03\xcfE\xb5\xd9_-p\xce\xbe\xa5\x87\xac\x80j_\xdd\xd9\x89W\xc8\xa5JMCm\xfe\x1d\xa9\xd8\x7f!\xa1\xb9{\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x002\xafv\x86\xd4\x03\xcfE\xb5\xd9_-p\xce\xbe\xa5\x87\xac\x80j\x00\x00\x00\x00\x00\x00\x00)\x00\x00\x00)6e1f4c47ecb533ffd0c8e52cdc88afb6cd39e20c (esc)
   \x00\x00\x00f\x00\x00\x00h\x00\x00\x00\x02D (esc)
   \x00\x00\x00i\x00\x00\x00j\x00\x00\x00\x01D\x00\x00\x00\xa4\x95 \xee\xa7\x81\xbc\xca\x16\xc1\xe1Z\xcc\x0b\xa1C5\xa0\xe8\xe5\xba\xcd\x01\x0b\x8c\xd9\x98\xf3\x98\x1aZ\x81\x15\xf9O\x8d\xa4\xabP`\x89\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x95 \xee\xa7\x81\xbc\xca\x16\xc1\xe1Z\xcc\x0b\xa1C5\xa0\xe8\xe5\xba\x00\x00\x00\x00\x00\x00\x00)\x00\x00\x00)4dece9c826f69490507b98c6383a3009b295837d (esc)
   \x00\x00\x00f\x00\x00\x00h\x00\x00\x00\x02E (esc)
@@ -757,7 +754,7 @@
 
   $ hg debugbundle ../rev.hg2
   Stream params: {}
-  b2x:changegroup -- '{}'
+  changegroup -- '{}'
       32af7686d403cf45b5d95f2d70cebea587ac806a
       9520eea781bcca16c1e15acc0ba14335a0e8e5ba
       eea13746799a9e0bfd88f29d3c2e9dc9389f524f
@@ -776,8 +773,7 @@
   addchangegroup return: 1
 
   $ cat ../rev-reply.hg2
-  HG2Y\x00\x00\x00\x00\x00\x00\x003\x15b2x:reply:changegroup\x00\x00\x00\x00\x00\x02\x0b\x01\x06\x01in-reply-to1return1\x00\x00\x00\x00\x00\x00\x00\x1f (esc)
-  b2x:output\x00\x00\x00\x01\x00\x01\x0b\x01in-reply-to1\x00\x00\x00dadding changesets (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00/\x11reply:changegroup\x00\x00\x00\x00\x00\x02\x0b\x01\x06\x01in-reply-to1return1\x00\x00\x00\x00\x00\x00\x00\x1b\x06output\x00\x00\x00\x01\x00\x01\x0b\x01in-reply-to1\x00\x00\x00dadding changesets (esc)
   adding manifests
   adding file changes
   added 0 changesets with 0 changes to 3 files
@@ -793,8 +789,8 @@
 Should still be a valid bundle
 
   $ cat ../genfailed.hg2
-  HG2Y\x00\x00\x00\x00\x00\x00\x00\x11 (esc)
-  b2x:output\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00L\x0fb2x:error:abort\x00\x00\x00\x00\x01\x00\x07-messageunexpected error: Someone set up us the bomb!\x00\x00\x00\x00\x00\x00\x00\x00 (no-eol) (esc)
+  HG20\x00\x00\x00\x00\x00\x00\x00\r (no-eol) (esc)
+  \x06output\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00H\x0berror:abort\x00\x00\x00\x00\x01\x00\x07-messageunexpected error: Someone set up us the bomb!\x00\x00\x00\x00\x00\x00\x00\x00 (no-eol) (esc)
 
 And its handling on the other size raise a clean exception
 

--- a/tests/test-bundle2-multiple-changegroups.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-bundle2-multiple-changegroups.t	Thu Apr 09 16:25:48 2015 -0400
@@ -14,13 +14,13 @@
   >     intermediates = [repo[r].p1().node() for r in heads]
   >     cg = changegroup.getchangegroup(repo, source, heads=intermediates,
   >                                      common=common, bundlecaps=bundlecaps)
-  >     bundler.newpart('b2x:output', data='changegroup1')
-  >     bundler.newpart('b2x:changegroup', data=cg.getchunks())
+  >     bundler.newpart('output', data='changegroup1')
+  >     bundler.newpart('changegroup', data=cg.getchunks())
   >     cg = changegroup.getchangegroup(repo, source, heads=heads,
   >                                      common=common + intermediates,
   >                                      bundlecaps=bundlecaps)
-  >     bundler.newpart('b2x:output', data='changegroup2')
-  >     bundler.newpart('b2x:changegroup', data=cg.getchunks())
+  >     bundler.newpart('output', data='changegroup2')
+  >     bundler.newpart('changegroup', data=cg.getchunks())
   > 
   > def _pull(repo, *args, **kwargs):
   >   pullop = _orig_pull(repo, *args, **kwargs)

--- a/tests/test-bundle2-pushback.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-bundle2-pushback.t	Thu Apr 09 16:25:48 2015 -0400
@@ -6,21 +6,21 @@
   > from mercurial import bundle2, pushkey, exchange, util
   > def _newhandlechangegroup(op, inpart):
   >     """This function wraps the changegroup part handler for getbundle.
-  >     It issues an additional b2x:pushkey part to send a new
+  >     It issues an additional pushkey part to send a new
   >     bookmark back to the client"""
   >     result = bundle2.handlechangegroup(op, inpart)
-  >     if 'b2x:pushback' in op.reply.capabilities:
+  >     if 'pushback' in op.reply.capabilities:
   >         params = {'namespace': 'bookmarks',
   >                   'key': 'new-server-mark',
   >                   'old': '',
   >                   'new': 'tip'}
   >         encodedparams = [(k, pushkey.encode(v)) for (k,v) in params.items()]
-  >         op.reply.newpart('b2x:pushkey', mandatoryparams=encodedparams)
+  >         op.reply.newpart('pushkey', mandatoryparams=encodedparams)
   >     else:
-  >         op.reply.newpart('b2x:output', data='pushback not enabled')
+  >         op.reply.newpart('output', data='pushback not enabled')
   >     return result
   > _newhandlechangegroup.params = bundle2.handlechangegroup.params
-  > bundle2.parthandlermapping['b2x:changegroup'] = _newhandlechangegroup
+  > bundle2.parthandlermapping['changegroup'] = _newhandlechangegroup
   > EOF
 
   $ cat >> $HGRCPATH <<EOF

--- a/tests/test-bundle2-remote-changegroup.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-bundle2-remote-changegroup.t	Thu Apr 09 16:25:48 2015 -0400
@@ -35,7 +35,7 @@
   >     def newpart(name, data=''):
   >         """wrapper around bundler.newpart adding an extra part making the
   >         client output information about each processed part"""
-  >         bundler.newpart('b2x:output', data=name)
+  >         bundler.newpart('output', data=name)
   >         part = bundler.newpart(name, data=data)
   >         return part
   > 
@@ -50,13 +50,13 @@
   >            bundledata = open(file, 'rb').read()
   >            digest = util.digester.preferred(b2caps['digests'])
   >            d = util.digester([digest], bundledata)
-  >            part = newpart('b2x:remote-changegroup')
+  >            part = newpart('remote-changegroup')
   >            part.addparam('url', url)
   >            part.addparam('size', str(len(bundledata)))
   >            part.addparam('digests', digest)
   >            part.addparam('digest:%s' % digest, d[digest])
   >         elif verb == 'raw-remote-changegroup':
-  >            part = newpart('b2x:remote-changegroup')
+  >            part = newpart('remote-changegroup')
   >            for k, v in eval(args).items():
   >                part.addparam(k, str(v))
   >         elif verb == 'changegroup':
@@ -65,7 +65,7 @@
   >             heads = [repo.lookup(r) for r in repo.revs(heads)]
   >             cg = changegroup.getchangegroup(repo, 'changegroup',
   >                 heads=heads, common=common)
-  >             newpart('b2x:changegroup', cg.getchunks())
+  >             newpart('changegroup', cg.getchunks())
   >         else:
   >             raise Exception('unknown verb')
   > 
@@ -137,7 +137,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -180,12 +180,12 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files (+1 heads)
-  remote: b2x:changegroup
+  remote: changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -228,12 +228,12 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:changegroup
+  remote: changegroup
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files (+1 heads)
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -279,17 +279,17 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files (+1 heads)
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 1 changes to 1 files
-  remote: b2x:changegroup
+  remote: changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -324,7 +324,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -338,7 +338,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -354,7 +354,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -372,7 +372,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -388,7 +388,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -404,7 +404,7 @@
   > EOF
   $ hg clone ssh://user@dummy/repo clone
   requesting all changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -433,12 +433,12 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
   added 2 changesets with 2 changes to 2 files (+1 heads)
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -467,7 +467,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: remote-changegroup: missing "url" param
   [255]
 
@@ -479,7 +479,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: remote-changegroup: missing "size" param
   [255]
 
@@ -491,7 +491,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: remote-changegroup: invalid value for param "size"
   [255]
 
@@ -503,7 +503,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   adding changesets
   adding manifests
   adding file changes
@@ -522,8 +522,8 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
-  abort: missing support for b2x:remote-changegroup - digest:foo
+  remote: remote-changegroup
+  abort: missing support for remote-changegroup - digest:foo
   [255]
 
 Missing digest
@@ -534,7 +534,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: remote-changegroup: missing "digest:sha1" param
   [255]
 
@@ -546,7 +546,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: remote-changegroup does not support ssh urls
   [255]
 
@@ -561,14 +561,14 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: http://localhost:$HGPORT/notbundle.hg: not a Mercurial bundle
   [255]
 
 Not a bundle 1.0
 
   $ cat > notbundle10.hg << EOF
-  > HG2Y
+  > HG20
   > EOF
   $ cat > repo/.hg/bundle2maker << EOF
   > remote-changegroup http://localhost:$HGPORT/notbundle10.hg notbundle10.hg
@@ -576,7 +576,7 @@
   $ hg pull -R clone ssh://user@dummy/repo
   pulling from ssh://user@dummy/repo
   searching for changes
-  remote: b2x:remote-changegroup
+  remote: remote-changegroup
   abort: http://localhost:$HGPORT/notbundle10.hg: not a bundle version 1.0
   [255]
 

--- a/tests/test-getbundle.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-getbundle.t	Thu Apr 09 16:25:48 2015 -0400
@@ -170,7 +170,7 @@
   $ hg debuggetbundle repo bundle -t bundle2
   $ hg debugbundle bundle
   Stream params: {}
-  b2x:changegroup -- "{'version': '01'}"
+  changegroup -- "{'version': '01'}"
       7704483d56b2a7b5db54dcee7c62378ac629b348
       29a4d1f17bd3f0779ca0525bebb1cfb51067c738
       713346a995c363120712aed1aee7e04afd867638

--- a/tests/test-strip.t	Wed Apr 08 09:38:09 2015 -0700
+++ b/tests/test-strip.t	Thu Apr 09 16:25:48 2015 -0400
@@ -218,7 +218,7 @@
   
   $ hg debugbundle .hg/strip-backup/*
   Stream params: {}
-  b2x:changegroup -- "{'version': '02'}"
+  changegroup -- "{'version': '02'}"
       264128213d290d868c54642d13aeaa3675551a78
   $ hg incoming .hg/strip-backup/*
   comparing with .hg/strip-backup/264128213d29-0b39d6bf-backup.hg
@@ -244,7 +244,7 @@
   
   $ hg debugbundle .hg/strip-backup/*
   Stream params: {}
-  b2x:changegroup -- "{'version': '02'}"
+  changegroup -- "{'version': '02'}"
       264128213d290d868c54642d13aeaa3675551a78
   $ hg pull .hg/strip-backup/*
   pulling from .hg/strip-backup/264128213d29-0b39d6bf-backup.hg