Adapted uses of versionchanged/versionadded to the new form.

Refs #20104.

docs/topics/http/middleware.txt

@@ -204,6 +204,7 @@ Dealing with streaming responses
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. versionchanged:: 1.5
+
     ``response`` may also be an :class:`~django.http.StreamingHttpResponse`
     object.
 

docs/topics/http/sessions.txt

@@ -71,6 +71,7 @@ default cache. To use another cache, set :setting:`SESSION_CACHE_ALIAS` to the
 name of that cache.
 
 .. versionchanged:: 1.5
+
     The :setting:`SESSION_CACHE_ALIAS` setting was added.
 
 Once your cache is configured, you've got two choices for how to store data in
@@ -451,6 +452,7 @@ Similarly, the ``expires`` part of a session cookie is updated each time the
 session cookie is sent.
 
 .. versionchanged:: 1.5
+
   The session is not saved if the response's status code is 500.
 
 .. _browser-length-vs-persistent-sessions:

docs/topics/http/shortcuts.txt

@@ -51,6 +51,7 @@ Optional arguments
     the :setting:`DEFAULT_CONTENT_TYPE` setting.
 
     .. versionchanged:: 1.5
+
         This parameter used to be called ``mimetype``.
 
 ``status``
@@ -129,6 +130,7 @@ Optional arguments
     the :setting:`DEFAULT_CONTENT_TYPE` setting.
 
     .. versionchanged:: 1.5
+
         This parameter used to be called ``mimetype``.