When viewing a keymap, prefix keys and keys in their maps are displayed as numerical values. E.g.
(keymap (M-delete . sp-unwrap-sexp) (27 keymap (23 . sp-copy-sexp) (6 . *-forward-sexp)))
Keys at the top-level map, as we can see, are not numbers. Here, there is
M-delete, which is clearly easier to understand than
Is it possible to turn these numbers back to keys sequences? How?