code: private StringBuilder verboseHelp() {
          StringBuilder verboseHelp = new StringBuilder(getScriptUsage());
          verboseHelp.append(NL);
          verboseHelp.append(getHelpPart("global.actions"));
          verboseHelp.append(NL);
          for (ExeAction action : ExeAction.values()) {
              verboseHelp.append(NL);
              verboseHelp.append("    ");
              verboseHelp.append(action.toString());
              verboseHelp.append(NL);
              verboseHelp.append(getDescription(action));
              verboseHelp.append(NL);
          }
          verboseHelp.append(NL);
          verboseHelp.append(getHelpPart("global.options"));
          verboseHelp.append(NL);
          verboseHelp.append(getHelpPart("global.options.statement"));
          verboseHelp.append(NL);
          verboseHelp.append(NL);
          return verboseHelp;
      }
docs: Constructs a string to represent the verbose help, which lists the
  usage for all tasks.
  
  @return String for the verbose help message