How-To-Open-a-Homebrew-Pull-Request: clarify brew audit --new for new formulae

docs/How-To-Open-a-Homebrew-Pull-Request.md

@@ -112,7 +112,7 @@ To make changes on a new branch and submit it for review, create a GitHub pull r
 
 4. Make your changes. For formulae or casks, use `brew edit` or your favourite text editor, using the guidelines in the [Formula Cookbook](Formula-Cookbook.md) or [Cask Cookbook](Cask-Cookbook.md) for reference.
    * If there's a `bottle do` block in the formula, don't remove or change it; we'll update it when we merge your PR.
-5. Test your changes by running the following, and ensure they all pass without issue. For changed formulae and casks, make sure you do the `brew audit` step after your changed formula/cask has been installed.
+5. For changed formulae and casks, make sure you do the `brew audit` step after your changed formula/cask has been installed.
 
    For formulae:
 
@@ -122,6 +122,16 @@ To make changes on a new branch and submit it for review, create a GitHub pull r
    brew audit --strict --online <CHANGED_FORMULA>
    ```
 
+   For new formulae, use `--new` instead (which implies `--strict`, `--online` and additional new-formula eligibility checks):
+
+   ```sh
+   HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source <NEW_FORMULA>
+   brew test <NEW_FORMULA>
+   brew audit --new <NEW_FORMULA>
+   ```
+
+   You can also run `brew lgtm` to run style, typecheck and tests on your changes in one go.
+
    For casks:
 
    ```sh