--- a/mercurial/hg.py	Mon Nov 05 22:58:19 2018 +0100
+++ b/mercurial/hg.py	Thu Nov 15 20:20:31 2018 +0900
@@ -366,7 +366,7 @@
     try:
         hardlink = None
         topic = _('linking') if hardlink else _('copying')
-        with ui.makeprogress(topic) as progress:
+        with ui.makeprogress(topic, unit=_('files')) as progress:
             num = 0
             srcpublishing = srcrepo.publishing()
             srcvfs = vfsmod.vfs(srcrepo.sharedpath)