Replaced sure() invocations with '!!' operator in libraries written on Kotlin.

libraries/sandbox/extensionTraits/src/kotlin2/Iterators.kt

@@ -102,14 +102,14 @@ public abstract class AbstractIterator<T>: Iterator<T> {
     override fun next(): T {
         if (!hasNext) throw NoSuchElementException()
         state = State.NotReady
-        return next.sure()
+        return next!!
     }
 
 
     /** Returns the next element in the iteration without advancing the iteration */
     fun peek(): T {
         if (!hasNext) throw NoSuchElementException()
-        return next.sure();
+        return next!!;
     }
 
     private fun tryToComputeNext(): Boolean {

libraries/sandbox/extensionTraits/src/kotlin2/Traversable.kt

@@ -201,7 +201,7 @@ public trait Traversable<T>: Iterable<T> {
     public inline fun makeString(separator: String = ", ", prefix: String = "", postfix: String = "", limit: Int = -1, truncated: String = "..."): String {
         val buffer = StringBuilder()
         appendString(buffer, separator, prefix, postfix, limit, truncated)
-        return buffer.toString().sure()
+        return buffer.toString()!!
     }
 
     /** Returns a list containing the everything but the first elements that satisfy the given *predicate* */

libraries/sandbox/templatelib/src/TemplateHtml.kt

@@ -65,7 +65,7 @@ abstract class Tag(val name : String) : Element() {
   fun toString(): String {
     val builder = StringBuilder()
     appendTo(builder)
-    return builder.toString().sure()
+    return builder.toString()!!
   }
 }
 

libraries/sandbox/templatelib/src/TemplateJavaIo.kt

@@ -23,7 +23,7 @@ class WriterPrinter(val writer: Writer) : Printer {
 fun Template.renderToText(): String {
   val buffer = StringWriter()
   renderTo(buffer)
-  return buffer.toString().sure()
+  return buffer.toString()!!
 }
 
 fun Template.renderTo(writer: Writer): Unit {