Simplified description of HttpResponse(<iterator>)

Related to 8b9b8d3b.

docs/ref/request-response.txt

@@ -555,28 +555,12 @@ file-like object::
 Passing iterators
 ~~~~~~~~~~~~~~~~~
 
-Finally, you can pass ``HttpResponse`` an iterator rather than strings. If you
-use this technique, the iterator should return strings.
+Finally, you can pass ``HttpResponse`` an iterator rather than strings.
+``HttpResponse`` will consume the iterator immediately, store its content as a
+string, and discard it.
 
-Passing an iterator as content to :class:`HttpResponse` creates a
-streaming response if (and only if) no middleware accesses the
-:attr:`HttpResponse.content` attribute before the response is returned.
-
-.. versionchanged:: 1.5
-
-    This technique is fragile and was deprecated in Django 1.5. If you need the
-    response to be streamed from the iterator to the client, you should use the
-    :class:`StreamingHttpResponse` class instead.
-
-    As of Django 1.7, when :class:`HttpResponse` is instantiated with an
-    iterator, it will consume it immediately, store the response content as a
-    string, and discard the iterator.
-
-.. versionchanged:: 1.5
-
-    You can now use :class:`HttpResponse` as a file-like object even if it was
-    instantiated with an iterator. Django will consume and save the content of
-    the iterator on first access.
+If you need the response to be streamed from the iterator to the client, you
+must use the :class:`StreamingHttpResponse` class instead.
 
 Setting header fields
 ~~~~~~~~~~~~~~~~~~~~~