code: private static String archString()
      {
          ArchType archType = calculateArch();
          return archType.toString().toLowerCase(Locale.ENGLISH);
      }
docs: Returns a the <strong>lower case</strong> String representation of
  the {@link #calculateArch() ArchType} of this platform. E.g.
  <code>"x86_64"</code>.
  
  @return The string describing the architecture