code: public CommandLine setUsageHelpWidth(int width) {
          getCommandSpec().usageMessage().width(width);
          for (CommandLine command : getCommandSpec().subcommands().values()) {
              command.setUsageHelpWidth(width);
          }
          return this;
      }
docs: Sets the maximum width of the usage help message. Longer lines are wrapped.
  <p>The specified setting will be registered with this {@code CommandLine} and the full hierarchy of its
  subcommands and nested sub-subcommands <em>at the moment this method is called</em>. Subcommands added
  later will have the default setting. To ensure a setting is applied to all
  subcommands, call the setter last, after adding subcommands.</p>
  @param width the maximum width of the usage help message
  @see UsageMessageSpec#width(int)
  @return this {@code CommandLine} object, to allow method chaining