anchor.diff:  
   
   == Advanced Usage Help Customization
  -=== Option List with Custom Layout
  -
  +=== Custom Layout
  +=== Table and Columns
  +=== Option Renderer
  +=== Parameter Renderer
  +=== Param Label Renderer
   
   
   == Subcommands
  
positive.code:     @Parameters(hidden = true) String[] all;
  }
  ----
  The above will generate the following usage help message:
  ----
  Usage: <main class> <host1> <port1> <host2> <port2range> [<port2range>] [<files>...]
        host1                   source host
  
negative.code: Some annotated fields in the below example class have a `paramLabel` attribute and others don't:
  [source,java]
  ----
  @Command(showDefaultValues = false)
  class ParamLabels {
      @Option(names = "-f",    paramLabel = "FILE", description = "a file")      File f;
      @Option(names = "-n",    description = "a number option")                  int number;
  