Small formatting changes to model unit tests to make them look better in the model examples online

"""

3. Giving models custom methods and custom managers

3. Giving models custom methods

Any method you add to a model will be available to instances.

"""

"""

27. Many-to-many and many-to-one relationships to the same table.

27. Many-to-many and many-to-one relationships to the same table

This is a response to bug #1535

"""

20. Object Pagination

Django provides a framework for paginating a list of objects in a few.  

This is often useful for dividing search results or long lists of objects

in to easily readable pages.

28. Object pagination

Django provides a framework for paginating a list of objects in a few lines

of code. This is often useful for dividing search results or long lists of

objects into easily readable pages.

"""

from django.db import models

class Article(models.Model):

"""

XXX. Transactions

15. Transactions

Django handles transactions in three different ways. The default is to commit

each transaction upon a write, but you can decorate a function to get

"""

XX. Validation

29. Validation

This is an experimental feature!

Each model instance has a validate() method that returns a dictionary of

validation errors in the instance's fields. This method has a side effect