title: Standard File Naming Conventions in Ruby
body: <p>For a file containing the given class, SomeCoolClass, what would be the proper or standard filename?</p>
  
  <pre>
   1. somecoolclass.rb
   2. some_cool_class.rb
   3. some-cool-class.rb
   4. SomeCoolClass.rb
  </pre>
  
  <p>or some other variation?</p>
  
  <p>I noticed in the Ruby stdlib, versions 1, 2 and 3 are used.</p>