anchor.diff:  }
   ----
   
  -The above example uses the <<Fully Automatic Help,mixinStandardHelpOptions>> attribute to mix in
  +The above example uses the <<Mixin Standard Help Options,mixinStandardHelpOptions>> attribute to mix in
   <<Help Options,`usageHelp`>> and <<Help Options,`versionHelp`>> options and registers the `help` subcommand.
   
   The usage help message for each subcommand is produced by calling `CommandLine.usage(new SubCommand(), out)`.
  
positive.code: ----
  
  === Custom Help Subcommands
  Custom help subcommands should mark themselves as a <<Help subcommands,help command>> to tell picocli not to throw a `MissingParameterException` when required options are missing.
  
  [source,java]
  ----
  
negative.code: ----
  
  Here is a small example application that uses the `CommandLine.call` <<Less Boilerplate,convenience method>>
  to do parsing and error handling in one line of code. The <<Mixin Standard Help Options,mixinStandardHelpOptions>> attribute is all
  that is needed to give your application usage help and version help.
  
  [[CheckSum-application]]
  