Show a directory entry

:Locate returns directories and its sink opens them, but the readable-file
guard made the key silently do nothing for one.

autoload/fzf/vim.vim

@@ -771,7 +771,8 @@ function! s:goto_entry(winid, bufnr, dir, kind, entry) abort
     call add(cmds, 'normal! zvzz')
   else
     let path = s:in_dir(a:dir, entry)
-    if !filereadable(path)
+    " :Locate and a custom source can return a directory, which the sink opens
+    if !filereadable(path) && !isdirectory(path)
       return
     endif
     let cmds = s:edit_cmds(a:winid, path)