Use [0...a.length] instead of [0..a.length-1]

Note that in CoffeScript:

coffee> a = []
[]
coffee> [0..a.length-1]
[ 0, -1 ]
coffee> [0...a.length]
[]
Merge pull request #279 from mattpap/fix-coffee-ranges

Use [0...a.length] instead of [0..a.length-1]