Fixed equality to be symmetric with respect to Atom.

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@14555 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

src/library/scala/xml/Text.scala

@@ -25,8 +25,9 @@ case class Text(_data: String) extends Atom[String](_data) {
     throw new java.lang.NullPointerException("tried to construct Text with null")
 
   final override def equals(x: Any) = x match {
-    case s:String  => s.equals(data)
+    case s:String  => s == data
     case s:Text    => data == s.data
+    case s:Atom[_] => data == s.data
     case _ => false
   }
 

src/library/scala/xml/Unparsed.scala

@@ -23,9 +23,10 @@ case class Unparsed(_data: String) extends Atom[String](_data) {
     throw new java.lang.NullPointerException("tried to construct Unparsed with null")
 
   final override def equals(x: Any) = x match {
-    case s:String   => s.equals(data)
+    case s:String   => s == data
     case s:Text     => data == s.data
     case s:Unparsed => data == s.data
+    case s:Atom[_]  => data == s.data
     case _ => false
   }