TST: fix tests after server update

tests/test_boolean.py

@@ -132,7 +132,7 @@ def test_record():
         assert_equal(
             rec3.get_property(
                 "SimpleBooleanProperty").get_errors()[0].description,
-            "Cannot parse value to boolean (either 'true' or 'false, "
+            "Cannot parse value to boolean (either 'true' or 'false', "
             "ignoring case).")
 
     finally: