for .. by is broken

[maxtaco]

This doesn't work as expected:

for i in [0..11] by 3
  await setTimeout defer(), 100
  console.log "#{i}"

[capndesign]

One thing that it looks like you missed is that two dots behave differently than three. So [0..1] should return [0,1] and [0...1] should return [0]. The three dots is behaving like two when using an await inside a loop, so [0...1] incorrectly returns [0,1].

[maxtaco]

Closed in 72b1468, hopefully for good.