code: public String getScriptUsage() {
          StringBuffer scriptUsage = new StringBuffer(NL);
          scriptUsage.append(getHelpPart("usage", COMMAND));
          scriptUsage.append(" {");
          ExeAction[] tasks = ExeAction.values();
          for (int i = 0; i < tasks.length; i++) {
              ExeAction task = tasks[i];
              scriptUsage.append(task.toString());
              if (i != (tasks.length - 1)) {
                  scriptUsage.append("|");
              }
          }
          scriptUsage.append("} [");
          scriptUsage.append(getHelpPart("global.options.lower"));
          scriptUsage.append("]");
          scriptUsage.append(NL);
          return scriptUsage.toString();
      }
docs: {@inheritDoc} Prints the usage statement. The format is:
  
  <pre>
  Usage: {tasks|...} [arguments]
  </pre>