run prettier

Author: Judahmeek

CONTRIBUTING.md

@@ -227,6 +227,7 @@ yalc add react-on-rails
 ```
 
 ### Testing the Generator
+
 The generators are covered by generator tests using Rails's generator testing helpers, but it never hurts to do a sanity check and explore the API. See [generator-testing.md](docs/contributor-info/generator-testing.md) for a script on how to run the generator on a fresh project.
 
 `rake run_rspec:shakapacker_examples_basic` is a great way to run tests on one generator. Once that works, you should run `rake run_rspec:shakapacker_examples`. Be aware that this will create a huge number of files under a `/gen-examples` directory. You should be sure to exclude this directory from your IDE and delete it once your testing is done.