private static void ShowHelp(IReadOnlyList <CommandLineOption> options)
{
Terminal.WriteLine("The best companion for the command line adventurer.");
Terminal.WriteLine();
var flagColumnsSize = CommandLineOption.ComputeFlagsColumnSize(options);
const string indent = " ";
const int lineLength = 120;
foreach (var option in options)
{
option.Write(indent, flagColumnsSize, lineLength);
}
Terminal.WriteLine();
}
