further style tweaks to code on Getting Started page
further style tweaks to code on Getting Started page

follows up on 20bcba1c9fd0531a4c6d9a5ca281af16b62cef59

jeantil/scala-lang,jeantil/scala-lang,andy1138/scala-lang,andy1138/scala-lang,jeantil/scala-lang,andy1138/scala-lang,andy1138/scala-lang,jeantil/scala-lang