Safari 4.0 treats CDATA and Text nodes seperately, but it still merges them when Node#normalize() is called, breaking XMLTest.  This method fixes the test and adds a comment to Node#normalize() explaining this behavior.

Patch by: jlabanca
Review by: jgw (desk)



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6057 8db76d5a-ed1c-0410-87a9-c151d255dfc7