More people submit PR for documents in Markdown files or other things via Github web editor. If they make a mistake then the CI fails but there is no chance to inform the user whats wrong.

I see some infos should be with the --debug-check but currently there is no output with this option.

Environments:

• Prettier Version: 1.18.2
• Running Prettier via: cli
• Runtime: node?
• Operating System: linux

Steps to reproduce:

prettier "**/*.{md,css,scss,yaml,yml,ts}" "--check"

Expected behavior:

Show each error and the changes like with --debug-check here in #4415

Actual behavior:

Show nothing about the errors:

> @ prettier /home/circleci/project
> prettier "**/*.{md,css,scss,yaml,yml,ts}" "--check"

Checking formatting...
docs/contributing/environment.md
Code style issues found in the above file(s). Forgot to run Prettier?

Also there are no more infos available with this commands:

prettier "**/*.{md,css,scss,yaml,yml,ts}" "--debug-check"
prettier "**/*.{md,css,scss,yaml,yml,ts}" "--debug-check" "--check"