message: docs: minor fixes in `docs-style-guide`
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diff: @@ -31,6 +31,8 @@ Here are a few essential commands for guide page authors.
  1. http://localhost:4200/ &mdash; browse to the app running locally.
  +You can combine `yarn docs-watch` and `yarn start` into one command with `yarn serve-and-sync`.
  +
  ## Guide pages
  All but a few guide pages are [markdown](https://daringfireball.net/projects/markdown/syntax "markdown") files with an `.md` extension.
  