Emacs Ch c 似乎不适用于 3 个和弦组合长？
我正在尝试在 emacs 中使用 Ch c 来找出组合键所绑定的内容。该组合是Cu Cc Cq，它在组织模式下重新对齐标签。然而，Emacs 只是尝试查找 Cu Cc，然后就失败了。我做错了什么？我意识到我可以轻松地查看 orgmode 源代码或其他东西来解决这个问题，但为了将来的参考，我会做什么来弄清楚这样的函数绑定到什么函数？
编辑：好的，所以它实际上是 Cu 后跟 Cc Cq，根据 emacs，这就是该组合所绑定的内容：
（org-set-tags-command 和可选参数 just-align）
为当前条目调用 set-tags 命令。
那么给这个命令赋予参数 4 到底意味着什么呢？
哦，只是给出一个解释：我正在尝试开始学习 emacs-lisp 和自定义，我想做的一件事就是将此命令添加到 before-save-hook 中，以便当我保存 org 文件时，标签会自动对齐。
最终编辑：我弄清楚了为什么这个命令的行为如此；给定前缀参数，它会改变其行为。在 elisp 中调用函数时如何设置前缀参数？
I'm trying to use C-h c in emacs to figure out what a key combination is bound to. The combination is C-u C-c C-q, which realigns tags in org-mode. However, Emacs just tries to look up C-u C-c and then fails. What am I doing wrong? I realize I could easily look at the orgmode source or something to figure this out, but for future reference what would I do to figure out what function something like this is bound to?
Edit: OK, so it's actually C-u followed by C-c C-q, and according to emacs this is what that combination is bound to:
(org-set-tags-command &optional arg just-align)
Call the set-tags command for the current entry.
So what exactly does it mean to give this command the argument 4?
Oh, just to give an explanation: I'm trying to start learning emacs-lisp and customization and one of the things I wanted to do was to have this command added to the before-save-hook so that when I save an org file, the tags get automatically aligned.
Final edit: I figured out why this command behaves as it does; given the prefix argument it changes its behavior. How can I set the prefix argument when calling the function in elisp?
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对于三个键长的组合来说，这不是一个普遍问题：例如，Ch c ESC ESC ESC（键盘转义退出）或 Ch c Cx rt（字符串矩形）都可以正常工作。
当我在组织模式下尝试 Ch c Cu Cc Cq 时，该命令在 Cu 之后中断并显示：
在迷你缓冲区中，这是正确的。所以，事实上，“Cu Cc Cq”不是一个命令，它是命令“Cc Cq”（org-table-wrap-region），以一个附加参数开头（4 - 请参阅 Ch k Cu 进行解释）。
It's not a general problem with combinations that are three keys long: For example, C-h c ESC ESC ESC (keyboard-escape-quit) or C-h c C-x r t (string-rectangle) both work fine.
When I try C-h c C-u C-c C-q in org-mode, the command interrupts after C-u and shows:
in the minibuffer, which is correct. So, in fact, "C-u C-c C-q" is not a command, it's the command "C-c C-q" (org-table-wrap-region) started with an additional argument (4 -- see C-h k C-u for an explanation).