Fixing tests after annotations changed

libraries/stdlib/src/kotlin/OrderingJVM.kt

@@ -58,7 +58,7 @@ private class FunctionComparator<T>(vararg val functions: T.() -> Any?):  Compar
         return "FunctionComparator${functions.toList()}"
     }
 
-    public override fun compare(o1: T?, o2: T?): Int {
+    public override fun compare(o1: T, o2: T): Int {
         return compareBy<T>(o1, o2, *functions)
     }
 
@@ -79,7 +79,7 @@ private class Function2Comparator<T>(val compareFn: (T,T) -> Int):  Comparator<T
         return "Function2Comparator${compareFn}"
     }
 
-    public override fun compare(a: T?, b: T?): Int {
+    public override fun compare(a: T, b: T): Int {
         if (a === b) return 0
         if (a == null) return - 1
         if (b == null) return 1

libraries/stdlib/src/kotlin/beans/Listeners.kt

@@ -11,7 +11,7 @@ import java.beans.*
 inline fun propertyChangeListener(fn: (PropertyChangeEvent) -> Unit): PropertyChangeListener = FunctionPropertyChangeListener(fn)
 
 private class FunctionPropertyChangeListener(val fn: (PropertyChangeEvent) -> Unit) : PropertyChangeListener {
-    public override fun propertyChange(e: PropertyChangeEvent?) {
+    public override fun propertyChange(e: PropertyChangeEvent) {
         if (e != null) {
             (fn)(e)
         }

libraries/stdlib/src/kotlin/dom/Dom.kt

@@ -410,7 +410,7 @@ Adds a newly created text node to an element which either already has an owner D
 */
 fun Element.addText(text: String?, doc: Document? = null): Element {
     if (text != null) {
-        val child = this.ownerDocument(doc).createTextNode(text)
+        val child = this.ownerDocument(doc).createTextNode(text)!!
         this.appendChild(child)
     }
     return this