I want to set viper-toggle-key to M-z (C-z is undo and only undo!). Looks easy: I just need to add
(setq viper-toggle-key [(meta ?z)]) in
.viper. Except I get this message:
Warning (initialization): An error occurred while loading `d:/Alexey/Home/.emacs.d/init.el':
error: Key sequence M-z starts with non-prefix key
I don't understand why: M-z is a single key, not a sequence!