Tweaks to Any and AnyRef documentation, courtes...

Tweaks to Any and AnyRef documentation, courtesy of Seth Tisue. No
review.

Author: heathermiller

src/library-aux/scala/Any.scala

@@ -14,7 +14,7 @@ package scala
 abstract class Any {
   /** Compares the receiver object (`this`) with the argument object (`that`) for equivalence.
    *
-   *  The default implementations of this method is an [[http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]]:
+   *  Any implementation of this method should be an [[http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]]:
    *
    *  - It is reflexive: for any instance `x` of type `Any`, `x.equals(x)` should return `true`.
    *  - It is symmetric: for any instances `x` and `y` of type `Any`, `x.equals(y)` should return `true` if and
@@ -61,6 +61,7 @@ abstract class Any {
   def getClass(): Class[_]
 
   /** Test two objects for equality.
+   *  The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.
    *
    *  @param  that  the object to compare against this object for equality.
    *  @return       `true` if the receiver object is equivalent to the argument; `false` otherwise.

src/library-aux/scala/AnyRef.scala

@@ -13,7 +13,9 @@ package scala
  */
 trait AnyRef extends Any {
 
-  /** The equality method for reference types.  See equals in [[scala.Any]].
+  /** The equality method for reference types.  Default implementation delegates to `eq`.
+   *
+   *  See also `equals` in [[scala.Any]].
    *
    *  @param  that    the object to compare against this object for equality.
    *  @return         `true` if the receiver object is equivalent to the argument; `false` otherwise.