   /// `body` is complicated than that results in unnecessarily repeated code.
   internal func _withNilOrAddress<NSType : AnyObject, ResultType>(
     of object: inout NSType?,
-    body: @noescape (AutoreleasingUnsafeMutablePointer<NSType?>?) -> ResultType
+    _ body:
+      @noescape (AutoreleasingUnsafeMutablePointer<NSType?>?) -> ResultType
   ) -> ResultType {
     return self == nil ? body(nil) : body(&object)
   }

  //     enumerateLinesUsing:(void (^)(NSString *line, BOOL *stop))block

  /// Enumerates all the lines in a string.
  public func enumerateLines(_ body: (line: String, stop: inout Bool) -> ()) {
    _ns.enumerateLines {
      (line: String, stop: UnsafeMutablePointer<ObjCBool>)
    in

    scheme tagScheme: String,
    options opts: NSLinguisticTagger.Options = [],
    orthography: NSOrthography? = nil,
    invoking body:
      (String, Range<Index>, Range<Index>, inout Bool) -> ()
  ) {
    _ns.enumerateLinguisticTags(
