Improve sleep resolution

[Dorumin]

Description

This improves the resolution of the sleep commands by simply not clamping to the default 100ms ctrl+c signal checking loop if the passed-in duration is shorter.

User-Facing Changes

You can use smaller values in sleep.

# Before
timeit { 0..100 | each { |row| print $row; sleep 10ms; } } # +10sec

# After
timeit { 0..100 | each { |row| print $row; sleep 10ms; } } # +1sec

It still depends on the internal behavior of thread::sleep and the OS timers. In windows it doesn't seem to go much lower than 15 or 10ms, or 0 if you asked for that.

After Submitting

Sleep didn't have anything documenting its minimum value, so this should be more in line with its standard procedure. It will still never sleep for less time than allocated.

Did you know sleep can take multiple durations, and it'll add them up? I didn't

[fdncred]

Seems reasonable. Thanks