"C-M-m" is close to "C-M-n" and "C-M-p", just as "M-RET" is close to
"RET". Previously, the only binding was "C-o g".
(define-key map (kbd "M-v") 'ivy-scroll-down-command)
(define-key map (kbd "C-M-n") 'ivy-next-line-and-call)
(define-key map (kbd "C-M-p") 'ivy-previous-line-and-call)
+ (define-key map (kbd "C-M-m") 'ivy-call)
(define-key map (kbd "M-q") 'ivy-toggle-regexp-quote)
(define-key map (kbd "M-j") 'ivy-yank-word)
(define-key map (kbd "M-i") 'ivy-insert-current)