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/ExtensionFunctions.jet

@@ -1,7 +1,7 @@
 // +JDK
 
 fun Int?.optint() : Unit {}
-val Int?.optval : Unit = ()
+val Int?.optval : Unit = #()
 
 fun <T, E> T.foo(<!UNUSED_PARAMETER!>x<!> : E, y : A) : T   {
   y.plus(1)
@@ -39,7 +39,7 @@ val <T> T.<!MUST_BE_INITIALIZED!>foo<!> : T
 
 fun Int.foo() = this
 
-namespace null_safety {
+package null_safety {
 
         fun parse(<!UNUSED_PARAMETER!>cmd<!>: String): Command? { return null  }
         class Command() {