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/Varargs.jet

@@ -1,5 +1,5 @@
 fun v(<!UNUSED_PARAMETER!>x<!> : Int, <!UNUSED_PARAMETER!>y<!> : String, vararg <!UNUSED_PARAMETER!>f<!> : Long) {}
-fun v1(vararg <!UNUSED_PARAMETER!>f<!> : fun (Int) : Unit) {}
+fun v1(vararg <!UNUSED_PARAMETER!>f<!> :  (Int) -> Unit) {}
 
 fun test() {
     v(1, "")