Fixed #23579 -- Changed GEOSGeometry.__str__ to include the SRID

Thanks Tim Graham for the review.

docs/releases/1.8.txt

@@ -558,6 +558,22 @@ run this query::
             last_login=models.F('date_joined')
         ).update(last_login=None)
 
+:mod:`django.contrib.gis`
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+* Support for GEOS 3.1 and GDAL 1.6 has been dropped.
+
+* Support for SpatiaLite < 2.4 has been dropped.
+
+* GIS-specific lookups have been refactored to use the
+  :class:`django.db.models.Lookup` API.
+
+* The default ``str`` representation of
+  :class:`~django.contrib.gis.geos.GEOSGeometry` objects has been changed from
+  WKT to EWKT format (including the SRID). As this representation is used in
+  the serialization framework, that means that ``dumpdata`` output will now
+  contain the SRID value of geometry objects.
+
 Miscellaneous
 ~~~~~~~~~~~~~
 
@@ -573,13 +589,9 @@ Miscellaneous
 
 * ``URLField.to_python`` no longer adds a trailing slash to pathless URLs.
 
-* ``django.contrib.gis`` dropped support for GEOS 3.1 and GDAL 1.6.
-
 * The :tfilter:`length` template filter now returns ``0`` for an undefined
   variable, rather than an empty string.
 
-* Support for SpatiaLite < 2.4 has been dropped.
-
 * ``ForeignKey.default_error_message['invalid']`` has been changed from
   ``'%(model)s instance with pk %(pk)r does not exist.'`` to
   ``'%(model)s instance with %(field)s %(value)r does not exist.'`` If you are
@@ -616,9 +628,6 @@ Miscellaneous
   :func:`~django.core.urlresolvers.reverse_lazy` now return Unicode strings
   instead of byte strings.
 
-* GIS-specific lookups have been refactored to use the
-  :class:`django.db.models.Lookup` API.
-
 * The ``CacheClass`` shim has been removed from all cache backends.
   These aliases were provided for backwards compatibility with Django 1.3.
   If you are still using them, please update your project to use the real