Update cheatsheets

emacs

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# emacs
+
+> The extensible, customizable, self-documenting, real-time display editor.
+> See also `emacsclient`.
+> More information: <https://www.gnu.org/software/emacs>.
+
+- Start Emacs and open a file:
+
+`emacs {{path/to/file}}`
+
+- Open a file at a specified line number:
+
+`emacs +{{line_number}} {{path/to/file}}`
+
+- Run an Emacs Lisp file as a script:
+
+`emacs --script {{path/to/file.el}}`
+
+- Start Emacs in console mode (without an X window):
+
+`emacs --no-window-system`
+
+- Start an Emacs server in the background (accessible via `emacsclient`):
+
+`emacs --daemon`
+
+- Stop a running Emacs server and all its instances, asking for confirmation on unsaved files:
+
+`emacsclient --eval '(save-buffers-kill-emacs)'`
+
+- Save a file in Emacs:
+
+`<Ctrl> + X, <Ctrl> + S`
+
+- Quit Emacs:
+
+`<Ctrl> + X, <Ctrl> + C`