Variable: viper-delete-backwards-in-replace
viper-delete-backwards-in-replace is a customizable and buffer-local
variable defined in viper-init.el.gz.
Documentation
If t, DEL key will delete characters while moving the cursor backwards.
If nil, the cursor will move backwards without deleting anything.
Source Code
;; Defined in /usr/src/emacs/lisp/emulation/viper-init.el.gz
(defvar-local viper-delete-backwards-in-replace nil)