Emacs
2020年代のEmacs入門
https://emacs-jp.github.io/tips/emacs-in-2020
Effective Editing I: Movement
https://www.masteringemacs.org/article/effective-editing-movement
Emacsの基本的な操作
https://myemacs.readthedocs.io/ja/latest/start.html
Emacs key bind
https://www.aise.ics.saitama-u.ac.jp/~gotoh/EmacsKeybind.html
Emacs defining commands
https://www.gnu.org/software/emacs/manual/html_node/elisp/Defining-Commands.html