Minor reword

Author: javiereguiluz

components/phpunit_bridge.rst

@@ -335,10 +335,11 @@ allows you to mock the PHP's built-in time functions ``time()``, ``microtime()``
 ``sleep()``, ``usleep()`` and ``gmdate()``. Additionally the function ``date()``
 is mocked so it uses the mocked time if no timestamp is specified.
 
-This means that you don't need to make a single change in your original code, except when using ``new DateTime()``, which must be replaced by ``DateTime::createFromFormat('U', time())`` to use the mocked ``time()`` function.
-
 Other functions with an optional timestamp parameter that defaults to ``time()``
-will still use the system time instead of the mocked time.
+will still use the system time instead of the mocked time. This means that you
+may need to change some code in your tests. For example, instead of ``new DateTime()``,
+you should use ``DateTime::createFromFormat('U', time())`` to use the mocked
+``time()`` function.
 
 To use the ``ClockMock`` class in your test, add the ``@group time-sensitive``
 annotation to its class or methods. This annotation only works when executing