We no longer link JS by default, we need to modify manifest.js for that
now.

We no longer link all js by default, so we should do this test with a
css instead (we don't care about that specifics of the dir just that its
in the manifest and in this dir).

Since ff30db13, warning is not shown.

And enable `context_dependent` of Style/BracesAroundHashParameters cop.

This reverts commit 3420a145, reversing
changes made to afb66a5a.

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

- The `boot_rails` method from abstract_unit.rb is empty after 2abcdfd9.
- So let's remove it and its usage.

Sorry, I missed a few places in my last PR. This should be the last of
'em 😬

This was added in a4c358f8, but `config.assets` has been removed in 5172d933.
Also, do not use env path to `Sprockets::Cache::FileStore` even `sprockets-rails`.
ref: https://github.com/rails/sprockets-rails/blob/master/lib/sprockets/railtie.rb#L129

Be consistent in testing outputs from railties test and use /bin/rails everywhere(the default behaviour now) instead of mix of /bin/rake /bin/rails everywhere
[Ryo Hashimoto & Vipul A M]

Forgot to do it in 748b2f9c, when deprecating `serve_static_files`.

* Move `app/assets/manifest.js` to `app/assets/config/manifest.js`.
  Avoid the suggestion that you can/should deep-link `stylesheets/foo`.
* Pull in all toplevel stylesheets and JavaScripts, not just
  `application.js` and `.css`. Demonstrate how to use `link_directory`
  with a specified `.js`/`.css` type.
* Fix RAILS_ENV handling in assets tests.
* Shush warnings spam from third-party libs that distract from tests.

We can prevent the UglifierCompressor from being instantiated prematurely by setting precompile to an empty array in this test.

We recommend using the `bin/` executables in our docs and guides.
Let's make sure that our tests execute the same code path.

sprockets-rails will only add `Rails.application.assets` if compile is
no false. See change on sprockets-rails
https://github.com/rails/sprockets-rails/commit/d7c7ee19991c565eb77ee143be2d009ba4472122

See the behaviour change on sprockets-rails
https://github.com/rails/sprockets-rails/commit/56725e5843662189c6701478f7598db306d5fb02

Allow static asset serving from env variable (enhanced!)
Conflicts:
	railties/CHANGELOG.md