Sure!

I think we should leave --list-different as it is and add this to --check.

Alternative 1

prettier --check "**/*.{css,html,js,md,yml}"

Checking formatting...
html/all-types/index.html
html/experiments/viewport/script.js
Code style issues found in the above file(s). Forgot to run Prettier?
Running something like this should fix the issues:
prettier --write "**/*.{css,html,js,md,yml}"

Alternative 2

prettier --check "**/*.{css,html,js,md,yml}"

Checking formatting...
html/all-types/index.html
html/experiments/viewport/script.js
Code style issues found in the above file(s). Forgot to run Prettier?
Running something like this should fix the issues:
prettier --write html/all-types/index.html html/experiments/viewport/script.js

Alternative 3

prettier --check "**/*.{css,html,js,md,yml}"

Checking formatting...
html/all-types/index.html
html/experiments/viewport/script.js
Code style issues found in the above file(s). Forgot to run Prettier?
Check how your project runs Prettier! Here are some common ways:
prettier --write path/to/file.js
npm run prettier
????

Alternative 4

Anyone has other ideas?

Things to think about

Should we prefix the suggested command with npx to increase the chance of the command actually working?
We need to handle file names with spaces in them / shell quoting if we print globs or file names.

/cc @kachkaev since you came up with the nice --check flag.

Uh oh!

If list-different detects differences, it should print command for fixing #5277

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