[Swift 2.2] Request to merge code completion fix for keywords as argument labels

Hi Ted,

Code completion in Swift 2.2 is still putting back-ticks around argument labels that are keywords when forming calls, e.g., given:

  func find(x: Int, in array: [Int]) -> Int? { … }

code completion for “find” would back-tick “in” unnecessarily to form:

  find(<#x: Int#>, `in`: <#array: [Int]#>)

which immediately results in a diagnostic + Fix-It removing the back-ticks. This is fixed by

  [Code completion] Only escape var/let/inout in call argument lists. · apple/swift@f1aac08 · GitHub

which I’d like to pull into the Swift 2.2 branch.

  - Doug