Fix Python 3 support

hggithub/__init__.py

@@ -151,7 +151,7 @@ def _ghremote(git_repo, git_remote_url, git_branch, hg_bookmark):
 
 
 @command(
-    "ghclone", [], _("git_fork_path git_upstream_path working_directory"), norepo=True
+    b"ghclone", [], _("git_fork_path git_upstream_path working_directory"), norepo=True
 )
 def ghclone(ui, git_fork_url, git_upstream_url, working_directory, **opts):
     """Prepare working directory to work with github"""
@@ -163,7 +163,7 @@ def ghclone(ui, git_fork_url, git_upstream_url, working_directory, **opts):
         print(ex)
 
 
-@command("ghpull", [], _(""))
+@command(b"ghpull", [], _(""))
 def ghpull(ui, repo, **opts):
     os.chdir(repo.root)
     """Prepare working directory to work with github"""
@@ -174,7 +174,7 @@ def ghpull(ui, repo, **opts):
         pass
 
 
-@command("ghpush", [], _("bookmark"))
+@command(b"ghpush", [], _("bookmark"))
 def ghpush(ui, repo, bookmark, **opts):
     """Prepare working directory to work with github"""
     os.chdir(repo.root)
@@ -187,7 +187,7 @@ def ghpush(ui, repo, bookmark, **opts):
         print(ex)
 
 
-@command("ghremote", [], _("git_remote_path git_branch hg_bookmark"))
+@command(b"ghremote", [], _("git_remote_path git_branch hg_bookmark"))
 def ghremote(ui, repo, git_remote_url, git_branch, hg_bookmark, **opts):
     """Pull remote branch from alternate Git repository"""
     os.chdir(repo.root)