py3: drop b'' from debug message "moving bookmarks"

contrib/python3-whitelist

@@ -25,6 +25,7 b' test-bookmarks-merge.t'
 test-bookmarks-rebase.t
 test-bookmarks-strip.t
 test-bookmarks.t
+test-branch-change.t
 test-branch-option.t
 test-branch-tag-confict.t
 test-branches.t

mercurial/scmutil.py

@@ -689,7 +689,8 b' def cleanupnodes(repo, replacements, ope'
                 continue
             from . import bookmarks # avoid import cycle
             repo.ui.debug('moving bookmarks %r from %s to %s\n' %
-                          (oldbmarks, hex(oldnode), hex(newnode)))
+                          (util.rapply(pycompat.maybebytestr, oldbmarks),
+                           hex(oldnode), hex(newnode)))
             # Delete divergent bookmarks being parents of related newnodes
             deleterevs = repo.revs('parents(roots(%ln & (::%n))) - parents(%n)',
                                    allnewnodes, newnode, oldnode)