How do disable the syntax?

[vindarel]

Hello,

We can enable the syntax with (in-readtable clesh:syntax). How can we set it back to normal?

I tried:

(defun disable-shell-passthrough ()
  (set-macro-character #\! (get-macro-character #\! (copy-readtable nil)))
  (set-macro-character #\[ (get-macro-character #\[ (copy-readtable nil)))
  (set-macro-character #\] (get-macro-character #\] (copy-readtable nil))))

but I can't enable the syntax back again.