Fix url_for method's behavior. GH #3684.

[kennyj]

Fix url_for method's behavior when it is passed with :controller option which starts with "/" in a multiple nested controller. Please see a testcase, and #3864

 1) Failure:
test_controller_option_which_starts_with_'/'_from_multiple_nested_controller(TestMultipleNestedController) [test/dispatch/routing_test.rb:2593]:
Expected: "/pooh"
  Actual: "/foo//pooh"

It seems that this problem is occured on 3-1-stable, 3-2-stable, and master.

Closes #3864

[iHiD]

Does this fix #2575?

[kennyj]

It seems that this problem is same one ;-)

[kennyj]

@iHiD Do you think about this PR ? Will we have any problem ? (or should close #2575 too ?)

[iHiD]

I've got no issue with this PR at all. It's good. Thanks! :)
I'll check later to check it fixes my issue. I'll either mark the issue as closed or send a further PR that fixes that as well.

[houen]

Great update guys - wonderful to see this fixed :-) Is it too much to ask to have it posted here when it is inserted into core?

[houen]

Oh, by the way, with core, I mean stable release

[iHiD]

I closed the other ticket and then realised I still had a monkeypatch there that was causing it to work regardless of your patch. I've just spent half an hour trying to get master branch working on my codebase and I'm giving up. I get so many dependancies failing in my Gemfile.

I'm pretty certain that what you've got there will fix it, so I'm just going to leave the other ticket closed and I'll keep an eye on it. Thanks, @kennyj.

[iHiD]

@kennyj, sorry - could you put a PR for 3-2-stable too please so I can get rid of my monkey-patch? :)

[parndt]

Sorry to jump on the end of this ticket but.. any idea why this would cause resolve/refinerycms#1383 ?