(fset 'yes-or-no-p 'y-or-n-p)，这应该是个经典设置，我估计百分之99%的emacs用户都有这个设置，但我发现的我用了这么几年emacs还是没习惯过来，每当看到yes or no，还是会直接按回车，然后发现没反应，又回去按y， 
，应该是因为大部分软件的确认键都是回车键而不是y。
不知道有人没人改过这个，究竟能不能把yes or no改成<return> or no？
终端安装或者更新个什么都不都是y吗
yes-or-no-p is an alias for ‘y-or-n-p’.
(yes-or-no-p PROMPT)
Probably introduced at or before Emacs version 19.23.
Ask user a "y or n" question.
Return t if answer is "y" and nil if it is "n".
PROMPT is the string to display to ask the question. It should
end in a space; ‘y-or-n-p’ adds "(y or n) " to it.
No confirmation of the answer is requested; a single character is
enough. SPC also means yes, and DEL means no.
To be precise, this function translates user input into responses
by consulting the bindings in ‘query-replace-map’; see the
documentation of that variable for more information. In this
case, the useful bindings are ‘act’, ‘skip’, ‘recenter’,
‘scroll-up’, ‘scroll-down’, and ‘quit’.
An ‘act’ response means yes, and a ‘skip’ response means no.
A ‘quit’ response means to invoke ‘abort-recursive-edit’.
If the user enters ‘recenter’, ‘scroll-up’, or ‘scroll-down’
responses, perform the requested window recentering or scrolling
and ask again.
Under a windowing system a dialog box will be used if ‘last-nonmenu-event’
is nil and ‘use-dialog-box’ is non-nil.
(define-key query-replace-map (kbd "RET") 'act)
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终端确实是，我主要在图形界面下使用emacs。终端也是shell-mode用的比较多
这个在windows图形界面有用吗，我这好像没用，我是emacs-q 在配置后执行 m-x shell,然后c-x k,关闭这个shell buffer,回车还是关不掉这个shell，还是要用y
(define-key query-replace-map (kbd "RET") 'act) 原来这里RET指的是空格不是回车，我按空格关掉了
那就是不能改。除非重写 y-or-no-p。
想多了，空格是本來就有的
emacs master 分支的在这个新提交后可以使用 (setq use-short-answers t) 代替 (fset 'yes-or-no-p 'y-or-n-p)了。
emacs27 y-or-n-p 中可以设置 (define-key y-or-n-p-map [return] 'act) 让回车键表示输入 y。
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感谢，使用上了