如何定义M-up快捷键，我用这个绑定函数报错了

[Young-people]

Error in dotspacemacs/user-config: M- must prefix a single character, not up

;;(global-set-key (kbd “M-up”) 'move-line-up) ;;(global-set-key (kbd “M-down”) 'move-line-down)

[xuchunyang]

(kbd "M-<up>")