Fix Sphinx doctest build under Python 3.

I don't know how it actually passes, though, since test_engine.py
includes a bunch of other regexes to normalize, and if I take those
out then running the unittest doctest fails.

src/zope/pagetemplate/engine.py

@@ -179,8 +179,8 @@ def evaluateMacro(self, expr):
         ...
         >>> zc = ZopeContext(ExpressionEngine, {})
         >>> out = zc.evaluateMacro(expression)
-        >>> type(out)
-        <type 'list'>
+        >>> type(out) is list
+        True
 
         The method does some trivial checking to make sure we are getting
         back a macro like we expect: it must be a sequence of sequences, in