Use `append` to append characters to a String
Use `append` to append characters to a String

`+=` no longer appends characters, as of Xcode 6 beta 6.

mpurland/Swiftz,typelift/swiftz,mathcamp/swiftz,mpurland/Swiftz,Khan/swiftz,CodaFi/swiftz,ryanbooker/Swiftz,hffmnn/Swiftz,gaurav1981/Swiftz,gaurav1981/Swiftz,hffmnn/Swiftz,mathcamp/swiftz,Khan/swiftz,tranhieutt/Swiftz,gaurav1981/Swiftz,typelift/swiftz,ikesyo/Swiftz,tranhieutt/Swiftz,CodaFi/swiftz,ikesyo/Swiftz,mpurland/Swiftz,CodaFi/swiftz,ryanbooker/Swiftz,typelift/swiftz,ikesyo/Swiftz