bug: preview buffer don't open

[kkharji]

Maybe something here is deprecated

attach_mappings = function()
      actions.select_default:replace(function(prompt_bufnr, cmd)
        actions.close(prompt_bufnr)
        local last_bufnr = require("telescope.state").get_global_key "last_preview_bufnr"
        if cmd == "edit" then
          vim.cmd(string.format(":buffer %d", last_bufnr))
        elseif cmd == "new" then
          vim.cmd(string.format(":sbuffer %d", last_bufnr))
        elseif cmd == "vnew" then
          vim.cmd(string.format(":vert sbuffer %d", last_bufnr))
        elseif cmd == "tabedit" then
          vim.cmd(string.format(":tab sb %d", last_bufnr))
        end
      end)

      return true
    end