811f1f9a55
- Change to have better support for args like:
"--arg1 a --arg2 b"
"--arg1 a --arg2 b c"
"--arg1 a c --arg2 b c"
"c --arg1 a --arg2 b"
where option can have default values and position of
positional args doesn't matter that much.
- Make parser to be aware of if it's handling last option
so that we can differentiate if error can be given i.e.
with too many args, etc.
- Fixes #795