diff --git a/mercurial/repair.py b/mercurial/repair.py
--- a/mercurial/repair.py
+++ b/mercurial/repair.py
@@ -18,7 +18,7 @@ def _bundle(repo, bases, heads, node, su
     if usebundle2:
         cgversion = repo.ui.config('experimental', 'strip-bundle2-version')
         if cgversion not in changegroup.packermap:
-            repo.ui.warn(_('unknown strip-bundle2-version value %r; ' +
+            repo.ui.warn(_('unknown strip-bundle2-version value %r; '
                             'should be one of %r\n') %
                          (cgversion, sorted(changegroup.packermap.keys()),))
             cgversion = '01'