/// an exception is thrown.
///
/// \param hex_string Input string.
-/// \param sep character to use a a separator.
+/// \param sep character to use a a separator.
/// \param binary Vector receiving converted string into binary.
/// \throw isc::BadValue if the format of the input string is invalid.
void
///
/// This function supports the following formats:
///
-/// - yy<s>yy<s>yy<s>yy where <s> is either a colon or space, see
-/// @c decodeSeparatedHexString
+/// - yy:yy:yy:yy or yy yy yy yy - octets delimited by colons or
+/// spaces, see @c decodeSeparatedHexString
///
/// - yyyyyyyyyy
/// - 0xyyyyyyyyyy