同源问题：关于lispy-mode，还需要加入这条，才能解决lispy退格(比如lispy-delete-backward-char)造成的闪的问题
(add-to-list 'acm-continue-commands "\\`lispy-")
不知道哪位大佬能测试并PR一下：修改 (defcustom acm-continue-commands '(… … … )) 成新列表：
(defcustom acm-continue-commands
;; nil is undefined command
'(nil ignore universal-argument universal-argument-more digit-argument
self-insert-command org-self-insert-command
;; Avoid flashing completion menu when backward delete char
grammatical-edit-backward-delete backward-delete-char-untabify
python-indent-dedent-line-backspace delete-backward-char hungry-delete-backward
"\\`acm-" "\\`scroll-other-window" "\\`special-lispy-" "\\`lispy-")
"Continue ACM completion after executing these commands."
:type '(repeat (choice regexp symbol))
:group 'acm)