Merge pull request #10361 from tlk/patch-1

Clarification on the use of `:optional` and `:recommended`

docs/Formula-Cookbook.md

@@ -174,7 +174,7 @@ description can be overridden using the normal option syntax (in this case, the
     ```
 * Some [`Requirement`](https://rubydoc.brew.sh/Requirement)s can also take a string specifying their minimum version that the formula depends on.
 
-**Note:** [`option`](https://rubydoc.brew.sh/Formula#option-class_method)s are not allowed in Homebrew/homebrew-core as they are not tested by CI.
+**Note:** `:optional` and `:recommended` are not allowed in Homebrew/homebrew-core as they are not tested by CI.
 
 ### Specifying conflicts with other formulae