bug#22495: sleep floating point docs

[積丹尼 Dan Jacobson]

I can't tell if you are like the IRS: go ahead and add cents if you
insist. We'll do the truncation work for you. Or if you are saying that
you will be passing the cents along to the next layer...

I mean you even add additional arguments for him, so who knows the
motivation for all that flexibility.

Nobody can tell if you mean you are just tidying (int()) up his input
before passing it to a deeper layer that only takes ints.

Or if you are now "no longer unnecessarily not allowing the user to pass
floats if he wants. Which will be presented unharmed to the next layer."