anchor.diff:  ----
   
   === Usage Help Message Elements
  +The various elements of the usage help message are easily customized with annotations.
  +
   ==== Command Name
   In the above example, the program name is taken from the `name` attribute of the `Command` annotation:
   [source,java]
  
positive.code:                 "along with a log message from the user describing the changes.")
  class GitCommit { ... }
  ----
  The usage help message generated from this class is shown below in https://picocli.info/#_expanded_example[Expanded Example].
  
  
  
  
negative.code: that gets version information from a build-generated version properties file.
  
  == Usage Help
  === Example Usage Message
  Picocli makes it easy for your application to generate a usage help message like this:
  ----
  Usage: cat [-AbeEnstTuv] [--help] [--version] [FILE...]
  Concatenate FILE(s), or standard input, to standard output.
  