Standard library documentation continued.

core/builtins/native/kotlin/Boolean.kt

@@ -16,6 +16,10 @@
 
 package kotlin
 
+/**
+ * Represents a value which is either `true` or `false`. On the JVM, non-nullable values of this type are
+ * represented as values of the primitive type `boolean`.
+ */
 public class Boolean private () : Comparable<Boolean> {
     public fun not(): Boolean