No args, no errors
Usage:
  ./usage Test usage
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0

No args, with errors
Usage:
  ./usage Test usage
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 1, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 1, IFCONTINUED: 0

Args with short names only:
Usage:
  ./usage Test usage
  -a       First arg
  -b       Second arg
  -c       Third arg
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0

Args with long names only:
Usage:
  ./usage Test usage
      --AA   First arg
      --BB   Second arg
      --CC   Third arg
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0

Mix of short and long args:
Usage:
  ./usage Test usage
  -a           First arg
  -b, --BBBB   Second arg
      --CC     Third arg
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0

Mix of short and long and some missing description:
Usage:
  ./usage Test usage
  -a           First arg
  -b, --BBBB
      --CC     Third arg
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0

Mix of short and long and some long description:
Usage:
  ./usage Test usage
  -a           First arg
               The description has multiple lines,
               ...for some reason
  -b, --BBBB   12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
      --CC     Third arg
  -h, --help   print this help message
Child status:
IFEXITED   : 1, EXITSTATUS : 0, IFSIGNALED : 0, TERMSIG    : 0, COREDUMP   : 0, IFSTOPPED  : 0, STOPSIG    : 0, IFCONTINUED: 0