--- a/mercurial/commands.py	Sun Aug 05 16:44:16 2018 +0900
+++ b/mercurial/commands.py	Sun Aug 05 16:51:25 2018 +0900
@@ -5191,7 +5191,7 @@
                 fm.condwrite(showchar, 'status', '%s ', char, label=label)
                 fm.plain(fmt % repo.pathto(f, cwd), label=label)
                 if f in copy:
-                    fm.data(copy=copy[f])
+                    fm.data(source=copy[f])
                     fm.plain(('  %s' + end) % repo.pathto(copy[f], cwd),
                              label='status.copied')