Added more comments about unittest2.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@110470 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/README-TestSuite b/test/README-TestSuite
index f83fbb4..ea2c894 100644
--- a/test/README-TestSuite
+++ b/test/README-TestSuite
@@ -52,6 +52,12 @@
   Python.
 
   It currently has unittest2 0.5.1 from http://pypi.python.org/pypi/unittest2.
+  Version 0.5.1 of unittest2 has feature parity with unittest in Python 2.7
+  final. If you want to ensure that your tests run identically under unittest2
+  and unittest in Python 2.7 you should use unittest2 0.5.1. 
+
+  Later versions of unittest2 include changes in unittest made in Python 3.2 and
+  onwards after the release of Python 2.7.
 
 o dotest.pl