Fixed #19878 -- Deprecated TemplateView passing URL kwargs into context.

docs/internals/deprecation.txt

@@ -66,6 +66,9 @@ details on these changes.
 
 * The ``list`` message for ``ModelMultipleChoiceField`` will be removed.
 
+* ``django.views.generic.TemplateView`` will no longer pass URL kwargs directly
+  to the ``context``.
+
 See the :ref:`Django 3.1 release notes <deprecated-features-3.1>` for more
 details on these changes.
 

docs/ref/class-based-views/base.txt

@@ -117,8 +117,7 @@ MRO is an acronym for Method Resolution Order.
 
 .. class:: django.views.generic.base.TemplateView
 
-    Renders a given template, with the context containing parameters captured
-    in the URL.
+    Renders a given template.
 
     **Ancestors (MRO)**
 
@@ -162,12 +161,17 @@ MRO is an acronym for Method Resolution Order.
 
     **Context**
 
-    * Populated (through :class:`~django.views.generic.base.ContextMixin`) with
-      the keyword arguments captured from the URL pattern that served the view.
+    * Populated (through :class:`~django.views.generic.base.ContextMixin`).
     * You can also add context using the
       :attr:`~django.views.generic.base.ContextMixin.extra_context` keyword
       argument for :meth:`~django.views.generic.base.View.as_view`.
 
+    .. deprecated:: 3.1
+
+        Starting in Django 4.0, the keyword arguments captured from the URL
+        pattern won't be passed to the context. Reference them with
+        ``view.kwargs`` instead.
+
 ``RedirectView``
 ================
 

docs/releases/3.1.txt

@@ -640,6 +640,10 @@ Miscellaneous
 * The ``list`` message for :class:`~django.forms.ModelMultipleChoiceField` is
   deprecated in favor of ``invalid_list``.
 
+* The passing of URL kwargs directly to the context by
+  :class:`~django.views.generic.base.TemplateView` is deprecated. Reference
+  them in the template with ``view.kwargs`` instead.
+
 .. _removed-features-3.1:
 
 Features removed in 3.1