checkdoc-minor-mode is an interactive autoloaded compiled Lisp function in `checkdoc.el'.

(checkdoc-minor-mode &optional ARG)

Toggle automatic docstring checking (Checkdoc minor mode).
With a prefix argument ARG, enable Checkdoc minor mode if ARG is
positive, and disable it otherwise. If called from Lisp, enable
the mode if ARG is omitted or nil.

In Checkdoc minor mode, the usual bindings for `eval-defun' which is
bound to C-M-x and `checkdoc-eval-current-buffer' are overridden to include
checking of documentation strings.

key binding
--- -------

C-c Prefix Command
C-x Prefix Command
ESC Prefix Command

C-c ? Prefix Command

C-x ` checkdoc-continue

C-M-x checkdoc-eval-defun

C-c ? SPC checkdoc-rogue-spaces
C-c ? B checkdoc-ispell-current-buffer
C-c ? C checkdoc-ispell-comments
C-c ? D checkdoc-ispell
C-c ? M checkdoc-ispell-message-text
C-c ? S checkdoc-ispell-start
C-c ? X checkdoc-ispell-defun
C-c ? ` checkdoc-continue
C-c ? b checkdoc-current-buffer
C-c ? c checkdoc-comments
C-c ? d checkdoc
C-c ? e checkdoc-eval-current-buffer
C-c ? m checkdoc-message-text
C-c ? s checkdoc-start
C-c ? x checkdoc-defun
C-c ? ~ checkdoc-ispell-continue