In this section, we talked about bundling, testing, formatting, and linting your code using Deno's built in tooling. The hands on practice of running the commands should help you build the muscle memory needed when building a real application.
For the assignment from the last video, you needed to format a file in your workspace and lint it. You can do that with the following commands:
$ deno fmt /path/to/file.ts
$ deno lint /path/to/file.ts