Removing other occurrences of `the` appearing twice

Merge `:action` from routing scope and assign endpoint if both `:controller`
and `:action` are present. The endpoint assignment only occurs if there is
no `:to` present in the options hash so should only affect routes using the
shorthand syntax (i.e. endpoint is inferred from the the path).

Fixes #9856

Previously when app was mounted as following:

    class Foo
      def call(env)
        [200, {}, [env['PATH_INFO']]]
      end
    end

    RackMountRailsBug::Application.routes.draw do
      mount RackTest.new => "/foo"
    end

trailing slash was removed from PATH_INFO. For example requesting

    GET /foo/bar/

on routes defined above would result in a response containing "/foo/bar"
instead of "/foo/bar/".

This commit fixes the issue.

(closes #3215)

They were moved to actionview/ and are not used in actionpack

This commit creates structure for Action View gem and is first of a
series of commits extracting Action View from Action Pack.

The option to disable including a hidden ID field on a `fields_for` nested association was incorrectly documented as `hidden_field_id` instead of `include_id`

[ci skip]

Context: https://gist.github.com/radar/5793814

The `URI_REGEXP` that various AssetUrl helpers use is currently case
sensitive when checking for a URI scheme. This means if you try to pass
a URL like `HTTP://www.example.com/path/to/image.jpg`, you end up with
a bogus asset path: `/assets/HTTP://www.example.com/path/to/image.jpg`.

URLs are case insensitive, so this regexp should be as well.
Signed-off-by: NDavid Celis <me@davidcel.is>

- Add attributes `allowfullscreen`, `default`, `inert`, `sortable`,
`truespeed`, `typemustmatch`.
- Fix attribute `seamless` (previously misspelled `seemless`).
- Use `assert_dom_equal` instead of `assert_equal` in test.

We are setting this header to chrome=1 for Chrome Frame and this will be
retired soon. Check http://blog.chromium.org/2013/06/retiring-chrome-frame.html for
details

The ERBTracker template digest helper class was using a regex to match
render calls and it was incorrectly not matching against variables with
underscores in the name. This caused it to use the wrong regex match data
to populate the template dependency. Because underscore is a valid
character for a variable, this fixes the ERBTracker to match it properly.

in 'rubygems/package_task'