anchor.diff:  For example:
   
   .Java
  -[source,java, role=primary]
  +[source,java, role="primary"]
   ----
   MyApp app = new MyApp();
   CommandLine cmd = new CommandLine(app);
  
positive.code: ----
  
  .Kotlin/Kotest
  [source,kotlin,role=secondary]
  ----
  import io.kotest.core.spec.style.StringSpec
  import io.kotest.extensions.system.withEnvironment
  
negative.code: 
  For example, to clarify that a <<Required Subcommands,subcommand is mandatory>>, an application may specify `COMMAND`, without the `[` and `]` brackets:
  
  //.Java / Kotlin
  //[source,java,role="primary"]
  [source,java]
  ----
  @Command(name = "git", synopsisSubcommandLabel = "COMMAND")
  class Git { /* ... */ }
  