Example does not work on Swift2

[ghost]

Compilation error using advance:
let replace = pattern[advance(pattern.startIndex, 1)...advance(pattern.endIndex, -2)]

Error is:
'advance' is unavailable: call the 'advancedBy(n)' method on the index

[ghost]

let replace = pattern[advance(pattern.startIndex, 1)...advance(pattern.endIndex, -2)]

Replace above line by the one below:
let replace = pattern[pattern.startIndex.advancedBy(1)...pattern.endIndex.advancedBy(-2)]

[daltoniam]

Fixed. Thanks.