Make HttpResponse.get work like dict.get

[Michael Schurter]

>>> from django import http
>>> resp = http.HttpResponse()
>>> resp['Connection'] = 'close'
>>> resp.get('Connection')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
TypeError: get() takes exactly 3 arguments (2 given)

>>> foo = {}
>>> foo.get('Connection')
>>> 

[Victor van den Elzen <victor.van.den.elzen@…>]

The docs say "To set or remove a header in your response, treat it like a dictionary". So I don't think this needs more documentation.

14020_with_tests.patch is obvious, has a test, applies cleanly to r16353 and passes all tests, so IMHO it's ready for checkin.

[Jannis Leidel]

In [16417]:

Fixed #14020 -- Made the HttpResponse class slightly more behave like a dictionary, allowing the alternative argument to be unset. Serious thanks to schmichael and moopet.