在portacle中获取EMACS Lisp帮助文档的方法（Win11）
运行portacle
我的portacle安装目录为：D:\Programs\portacle\portacle
双击“portacle.exe”，运行程序。
获取Emacs Lisp的帮助文档
Introduction to Emacs Lisp
Emacs Lisp Reference
快捷键：
C-<chr> means hold the CONTROL key while typing the character <chr>
Thus, C-f would be: hold the CONTROL key and type f.
M-<chr> means hold the META or EDIT or ALT key down while typing <chr>.
If there is no META, EDIT or ALT key, instead press and release the
ESC key and then type <chr>. We write <ESC> for the ESC key.