copy: fix introduced bug.

mercurial/commands.py

@@ -1066,7 +1066,7 b' def docopy(ui, repo, pats, opts, wlock):'
                 os.makedirs(targetdir)
             try:
                 restore = repo.dirstate.state(abstarget) == 'r'
-                if restore and not dry_run:
+                if restore and not opts['dry_run']:
                     repo.undelete([abstarget], wlock)
                 try:
                     if not opts['dry_run']: