Fixed title formatting in backwards-incompat section of 1.10 release notes

* ...

``select_related()`` prohibits non-relational fields for nested relations

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-------------------------------------------------------------------------

Django 1.8 added validation for non-relational fields in ``select_related()``::

    FieldError: Non-relational field given in select_related: 'name'

``_meta.get_fields()`` returns consistent reverse fields for proxy models

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-------------------------------------------------------------------------

Before Django 1.10, the :meth:`~django.db.models.options.Options.get_fields`

method returned different reverse fields when called on a proxy model compared

cases.

:attr:`AbstractUser.username <django.contrib.auth.models.User.username>` ``max_length`` increased to 150

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

--------------------------------------------------------------------------------------------------------

A migration for :attr:`django.contrib.auth.models.User.username` is included.

If you have a custom user model inheriting from ``AbstractUser``, you'll need

    admin.site.register(User, UserAdmin)

Dropped support for PostgreSQL 9.1

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

----------------------------------

Upstream support for PostgreSQL 9.1 ends in September 2016. As a consequence,

Django 1.10 sets PostgreSQL 9.2 as the minimum version it officially supports.

``runserver`` output goes through logging

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-----------------------------------------

Request and response handling of the ``runserver`` command is sent to the

:ref:`django-server-logger` logger instead of to ``sys.stderr``. If you

        }

    }

``auth.CustomUser`` and ``auth.ExtensionUser`` test models were removed.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

``auth.CustomUser`` and ``auth.ExtensionUser`` test models were removed

-----------------------------------------------------------------------

Since the introduction of migrations for the contrib apps in Django 1.8, the

tables of these custom user test models were not created anymore making them

unusable in a testing context.

Miscellaneous

~~~~~~~~~~~~~

-------------

* The ``repr()`` of a ``QuerySet`` is wrapped in ``<QuerySet >`` to

  disambiguate it from a plain list when debugging.