Fixed inconsistent punctuation in tutorial 5.

Tests are simple routines that check the operation of your code.

Testing operates at different levels. Some tests might apply to a tiny detail

- *does a particular model method return values as expected?*, while others

examine the overall operation of the software - *does a sequence of user inputs

on the site produce the desired result?* That's no different from the kind of

(*does a particular model method return values as expected?*) while others

examine the overall operation of the software (*does a sequence of user inputs

on the site produce the desired result?*). That's no different from the kind of

testing you did earlier in :doc:`Tutorial 1 </intro/tutorial01>`, using the

shell to examine the behavior of a method, or running the application and

entering data to check how it behaves.