diff -r ea72da71ad69 -r 09814946cc6a mercurial/debugcommands.py
--- a/mercurial/debugcommands.py	Tue Feb 12 13:42:42 2019 -0800
+++ b/mercurial/debugcommands.py	Tue Feb 12 13:46:38 2019 -0800
@@ -1808,7 +1808,7 @@
 
 @command('debugpathcopies',
          cmdutil.walkopts,
-         'hg debugcopies REV1 REV2 [FILE]',
+         'hg debugpathcopies REV1 REV2 [FILE]',
          inferrepo=True)
 def debugpathcopies(ui, repo, rev1, rev2, *pats, **opts):
     """show copies between two revisions"""