files: only check for removed, not unknown or missing

ctx.matches() doesn't return unknown files, and repo.dirstate[f] never returns
'!' for an answer.

mercurial/commands.py

@@ -3220,7 +3220,7 b' def files(ui, repo, *pats, **opts):'
 
     m = scmutil.match(ctx, pats, opts)
     for f in ctx.matches(m):
-        if rev is None and repo.dirstate[f] in 'r?!':
+        if rev is None and repo.dirstate[f] == 'r':
             continue
         fm.startitem()
         if ui.verbose: