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/cast/WhenErasedDisallowFromAny.jet

@@ -3,6 +3,6 @@
 import java.util.List;
 
 fun ff(l: Any) = when(l) {
-    is <!CANNOT_CHECK_FOR_ERASED!>List<String><!> => 1
+    is <!CANNOT_CHECK_FOR_ERASED!>List<String><!> -> 1
     else <!SYNTAX!>2<!>
 }