ability to declare long parameters using just a single `-`, e.g. `-Ssendwait`

[FelixSchwarz]

Some Unix commands have longer parameter names which just start with a single dash, e.g. -Ssendwait. argparse can handle these parameters but I'm unable to do this with docopt-ng:

#!/usr/bin/env python3
"""
Usage:
  foo [options]

Options:
  -Ssendwait     wait until request was sent
  -Snosendwait   return immediately
"""

from docopt import docopt
arguments = docopt(__doc__)
print(arguments)

$ ./parse-docopt.py -Snosendwait
Warning: found unmatched (duplicate?) arguments [Option('-S', None, 0, True), Option('-n', None, 0, True), Option('-o', None, 0, True), Option('-s', None, 0, True), Option('-e', None, 0, True), Option('-n', None, 0, True), Option('-d', None, 0, True), Option('-w', None, 0, True), Option('-a', None, 0, True), Option('-i', None, 0, True), Option('-t', None, 0, True)]
Usage:
  foo [options]

[NickCrews]

Hi! Thanks for the issue. Can you explain why you need to use this new syntax, and the existing syntax isn't adequate? Compatibility with an existing other command? Which one? Eg what is stopping you for defining your API as '--nosendwait'? I'm hesitant to increase the scope of docopt unless there is no other workaround. (I realize I'm being curmudgeonly here, thanks for your patience). Thank you!

[FelixSchwarz]

Yes, this is 100% just to reproduce the CLI parameters of existing applications like /usr/bin/mailx and /usr/bin/sendmail. I can understand if this is out of scope for docopt and it is certainly not a "common" thing. Currently I am resorting to argparse here but I'd love to use only docopt, maybe even by handing in some custom CLI parser or so?