[1.2.X] Added crossref targets for a couple of Django exceptions and cleaned up related reST markup.

Backport of [15733] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15734 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/ref/databases.txt

@@ -231,7 +231,7 @@ MySQLdb 1.2.1p2 or 1.2.2, you should still use ``utf8_collation_ci_swedish``
 table (usually called ``django_session``) and the
 :class:`django.contrib.admin.models.LogEntry` table (usually called
 ``django_admin_log``). Those are the two standard tables that use
-:class:`~django.db.model.TextField` internally.
+:class:`~django.db.models.TextField` internally.
 
 .. _fixed in MySQLdb 1.2.2: http://sourceforge.net/tracker/index.php?func=detail&aid=1495765&group_id=22307&atid=374932
 

docs/ref/exceptions.txt

@@ -104,6 +104,18 @@ ValidationError
     :ref:`Model Field Validation <validating-objects>` and the
     :doc:`Validator Reference </ref/validators>`.
 
+.. currentmodule:: django.core.urlresolvers
+
+NoReverseMatch
+--------------
+.. exception:: NoReverseMatch
+
+    The :exc:`NoReverseMatch` exception is raised by
+    :mod:`django.core.urlresolvers` when a matching URL in your URLconf
+    cannot be identified based on the parameters supplied.
+
+.. currentmodule:: django.db
+
 Database Exceptions
 ===================
 
@@ -112,6 +124,9 @@ Django wraps the standard database exceptions :exc:`DatabaseError` and
 implementation of these classes. These database exceptions are
 provided in :mod:`django.db`.
 
+.. exception:: DatabaseError
+.. exception:: IntegrityError
+
 The Django wrappers for database exceptions behave exactly the same as
 the underlying database exceptions. See `PEP 249 - Python Database API
 Specification v2.0`_ for further information.

docs/ref/templates/builtins.txt

@@ -572,7 +572,8 @@ You cannot check for equality with Python objects such as ``True`` or
 tag instead.
 
 .. versionadded:: 1.2
-   An alternative to the ``ifequal`` tag is to use the :ttag:`if` tag and the ``==`` operator.
+   An alternative to the ``ifequal`` tag is to use the :ttag:`if` tag and the
+   ``==`` operator.
 
 .. templatetag:: ifnotequal
 
@@ -582,7 +583,8 @@ ifnotequal
 Just like ``ifequal``, except it tests that the two arguments are not equal.
 
 .. versionadded:: 1.2
-   An alternative to the ``ifnotequal`` tag is to use the :ttag:`if` tag and the ``!=`` operator.
+   An alternative to the ``ifnotequal`` tag is to use the :ttag:`if` tag and the
+   ``!=`` operator.
 
 .. templatetag:: include
 
@@ -632,7 +634,8 @@ load
 
 Load a custom template tag set.
 
-See :doc:`Custom tag and filter libraries </howto/custom-template-tags>` for more information.
+See :doc:`Custom tag and filter libraries </howto/custom-template-tags>` for
+more information.
 
 .. templatetag:: now
 
@@ -905,8 +908,8 @@ refer to the name of the pattern in the ``url`` tag instead of using the
 path to the view.
 
 Note that if the URL you're reversing doesn't exist, you'll get an
-:exc:`NoReverseMatch` exception raised, which will cause your site to display an
-error page.
+:exc:`~django.core.urlresolvers.NoReverseMatch` exception raised, which will
+cause your site to display an error page.
 
 If you'd like to retrieve a URL without displaying it, you can use a slightly
 different call::

docs/topics/db/index.txt

@@ -1,6 +1,8 @@
 Models and databases
 ====================
 
+.. module:: django.db
+
 A model is the single, definitive source of data about your data. It contains
 the essential fields and behaviors of the data you're storing. Generally, each
 model maps to a single database table.