title: maven "rerun with -feature" when compiling scala
body: <p>I recently noticed Scala compiler warnings that maven was generating that looked like this:</p>
  
  <p>[WARNING] warning: there were 4 deprecation warning(s); re-run with -deprecation for details</p>
  
  <p>[WARNING] warning: there were 3 feature warning(s); re-run with -feature for details</p>
  
  <p>[WARNING] two warnings found</p>
  
  <p>It was not immediately apparent to me how to follow the warning's instructions so I could get details on how to change my code.</p>