GreatSyntacticShift: Syntax for function types, function literals, when and tuples

Bug:
fun loop(var times : Int) {
   while(times > 0) {
        val u : (value : Int) -> Unit = { // This arrow is confusing the lookahead
            System.out?.println(it)
        }
        u(times--)
   }
}

compiler/testData/diagnostics/tests/StringTemplates.jet

@@ -3,8 +3,8 @@ fun demo() {
   val a = ""
   val asd = 1
   val bar = 5
-  fun map(f : fun () : Any?) : Int  = 1
-  fun buzz(f : fun () : Any?) : Int  = 1
+  fun map(f :  () -> Any?) : Int  = 1
+  fun buzz(f :  () -> Any?) : Int  = 1
   val sdf = 1
   val foo = 3;
     "$abc"