* [fix] `optionsfirst` can work as expected (previously it can not recognize the
expected arguments of a option and lead to fail):
"""
Usage: prog [options] -w<val> <arg>
"""
from docpie import docpie
print(docpie(__doc__), ['prog', '-w', 'sth', 'arg'], optionsfirst=True)
{'--': False, '-w': 'sth', '<arg>': 'arg'}