What is your tutorial about?
TRAMP is for transparently accessing remote files from within Emacs.
https://www.gnu.org/software/emacs/manual/html_node/tramp/Overview.html
Who might find this useful?
People who happened to get on the Emacs boat. And the Glitch boat. What a combo!
Tutorial:
TRAMP is way smart. It can figure out the weird TTY-ridden invalid-UTF-8-clobbering thing that is the Glitch terminal. All it needs is a program that connects to that terminal.
1. Get a program that connects to the Glitch terminal
It just so happens that I wrote such a program:
Get version 1.3.0 (or later, in the future 
)
mkdir -p ~/.local/bin
curl -Lo ~/.local/bin/snail https://github.com/wh0/snail-cli/releases/download/v1.3.0/snail.js
chmod +x ~/.local/bin/snail
(You might have to restart your shell in some distros if .local/bin didn’t exist.)
Set up your Glitch account by getting your persistent token
mkdir -p ~/.config/snail
echo xxxxxxxx-xxxx-4xxx-xxxx-xxxxxxxxxxxx >~/.config/snail/persistent-token
2. Add a custom TRAMP method
Put this in your .emacs:
(with-eval-after-load 'tramp
(add-to-list 'tramp-methods
'("snail"
(tramp-login-program "snail")
(tramp-login-args (("term") ("-p") ("%h") ("--no-raw")))
(tramp-remote-shell "/bin/sh")
(tramp-remote-shell-args ("-c")))))
I think you have to restart Emacs for it to take effect 
3. Open a file from a Glitch project
Use the filename format /snail:(your project domain):(path in project).
emacs /snail:snail-cli:src/index.js
It goes in through the terminal, so you have to be a collaborator on the project.