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/backingField/CustomGetValGlobal.jet

@@ -1,4 +1,4 @@
-namespace customGetValGlobal {
+package customGetValGlobal {
     val zz = 1
         get() = $zz * 2
     

compiler/testData/diagnostics/tests/backingField/kt462BackingFieldsResolve.jet

@@ -1,7 +1,7 @@
 //KT-462 Consider allowing initializing properties via property names when it is safe
 //KT-598 Allow to use backing fields after this expression
 
-namespace kt462
+package kt462
 
 abstract class TestInitializationWithoutBackingField() {
     val valWithBackingField : Int

compiler/testData/diagnostics/tests/backingField/kt782namespaceLevel.jet

@@ -1,6 +1,6 @@
 // KT-782 Allow backing field usage for accessors of variables on namespace level
 
-namespace kt782
+package kt782
 
 val z : Int = 34