When using eldoc in conjunction with Evil mode in Emacs, ElDoc help disappears from the minibuffer after certain Evil commands are executed (e.g., commands like evil-delete-back-to-indentation, evil-delete-backward-word, evil-insert, evil-insert-line, evil-append, and evil-append-line... are not automatically included in ElDoc's help system.)

Suggested Solution

To improve the ElDoc experience for Evil mode users, adding the following commands to the evil package will fix the issue:

;; Includes:
;;   - evil-delete-backward-word (C-w)
;;   - evil-delete-back-to-indentation (C-u)
;;   - evil-delete-backward-char-and-join (C-h)
;;   - (And other evil-delete-* commands.)
(eldoc-add-command-completions "evil-delete")

;; When the user switches to insert mode
(eldoc-add-command 'evil-insert)
(eldoc-add-command 'evil-insert-line)
(eldoc-add-command 'evil-append)
(eldoc-add-command 'evil-append-line)

After adding these commands to eldoc-add-command, users will receive meaningful ElDoc messages for these Evil commands.