Change a type in the xmlEquality method so that it works on Seq[Node] instead of just Node, which
turned out to be needed by Matchers' equal and ===.


git-svn-id: http://scalatest.googlecode.com/svn/trunk@4882 fd1274fd-080f-5963-8033-43ee40fcd1de
Tweaked the intended use case box for Spec.


git-svn-id: http://scalatest.googlecode.com/svn/trunk@4883 fd1274fd-080f-5963-8033-43ee40fcd1de
Fleshed out Scaladoc for EqualityConstraints subtypes.


git-svn-id: http://scalatest.googlecode.com/svn/trunk@4884 fd1274fd-080f-5963-8033-43ee40fcd1de