Fix the simplePrint unittest for python3.

To make it running under python2/3 a the same time I had to reduce the
number of items to print.

py2: print (1, 2, 3) => prints the tuple (1, 2, 3)
py3: print(1, 2, 3) => prints the elements: 1, 2, 3

However I have to use the (), because in python3 print is not a
statement anymore.

src/Products/PythonScripts/tests/testPythonScript.py

@@ -202,7 +202,7 @@ def testFibonacci(self):
 
     def testSimplePrint(self):
         res = self._filePS('simple_print')()
-        self.assertEqual(res, 'a 1 []\n')
+        self.assertEqual(res, 'a\n')
 
     def testComplexPrint(self):
         res = self._filePS('complex_print')()