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/LValueAssignment.jet

@@ -1,4 +1,4 @@
-namespace lvalue_assignment
+package lvalue_assignment
 
 open class B() {
     var b: Int = 2
@@ -38,7 +38,7 @@ class D() {
 
 fun cannotBe(var <!UNUSED_PARAMETER!>i<!>: Int) {
     <!UNRESOLVED_REFERENCE!>z<!> = 30;
-    <!VARIABLE_EXPECTED!>()<!> = ();
+    <!VARIABLE_EXPECTED!>#()<!> = #();
 
     (<!VARIABLE_EXPECTED!>i <!USELESS_CAST!>as<!> Int<!>) = 34
     (<!VARIABLE_EXPECTED!>i is Int<!>) = false