Short flags should be combined

[lespea]

Describe what you want

Short flags should be able to be joined in one group

Why is it necessary

Very common practice for short args to be grouped, saves a lot of typing when doing multiple flags

Test case examples [Optional]

If the Flags -s and -t are added, then you should be able to call the binary with -st to specify that both the s and t flags are set. This can get tricky if you want to support non-flags (most likely in the trailing position) so you could do something like -stn10 or maybe -stn 10 if -n was an Int argument.

[hellflame]

It's an idea, but it would confuse user a lot. When I start the project, I wondered if I should do so.

but since there's no length limit on short args, -stn is just one short args

parser.Int("stn", "", nil)  // it will accept '-stn 10'

I guess I'll wonder a little more to complete this feature