Add example for URLconfs for how to concatenate calls to patterns() when composing urlpatterns to allow for URLs not associated with polls.views

[filmer]

This was my question and answer that I asked in the IRC chatroom #Django on freenode. I thought it might be worth showing an example of this. Maybe it is beyond the scope of this document - maybe not... for sure it was a question on my mind when I read this tutorial.

Chatroom copy/paste:
[1:52pm] filmer: I have a newb question about urls - I'm following ​http://docs.djangoproject.com/en/dev/intro/tutorial03/#simplifying-the-urlconfs And under "Simplifying the URLconfs it shows how you can set 'polls.views' at the beginning of patterns variable. My question is - what if later on down in patterns you want to list something else that has nothing to do with polls.views - for instance admin or CSS or anything else that you might have going on - how do you snip off 'polls.views'?

... [cut out chat room chatter here]

[1:54pm] j00bar: filmer: you either don't put anything at the beginning of patterns or you concatenate multiple calls to patterns() together when composing urlpatterns
[1:54pm] filmer: j00bar: Thank you very much
[1:55pm] • filmer owes j00bar a beer

... [cut out chat room chatter here]

[1:56pm] filmer: maybe they should show an example of that in the tutorial - it might prove helpful in the future for other dumb people like me

[Gabriel Hurley]

(In [14472]) Fixed #14627 -- Made Tutorial 3 more explicit regarding the transformations the URLconf undergoes in the final two sections, and gave an example of concatenating two patterns() in the process. Thanks to filmer for the report.

[Gabriel Hurley]

(In [14473]) [1.2.X] Fixed #14627 -- Made Tutorial 3 more explicit regarding the transformations the URLconf undergoes in the final two sections, and gave an example of concatenating two patterns() in the process. Thanks to filmer for the report.

Backport of [14472] from trunk.