Try to create new issue in galeksandrp/httpse with root domain in issue title and see how Travis, Heroku and Sublist3r magic create a pull request filled with generated rules.
Proof:
Step 1. galeksandrp/httpse#3
-> Step 2. https://travis-ci.org/galeksandrp/httpse/builds/178709525
-> Step 3. #7692