When debugging routes ,it can sometimes be difficult to understand exactly how the paths are matched. This PR adds a JS based path matching widget to the `/rails/info/routes` output. You can enter in a path, and it will tell you which of the routes that path matches, while preserving order (top match wins).
The matching widget in action:
Prior to this PR the only way to check matching paths is via mental math, or typing in a path in the url bar and seeing where it goes. This feature will be an invaluable debugging tool by dramatically decreasing the time needed to check a path match.
ATP actionpack
It is used by the table formatter only, and it's already inside a routes
directory that namespaces it properly, so calling it just "table" seems
simpler.
When someone gets a routing exception, the routes are rendered (starting in Rails 4.0). This PR brings parity between the html routes in the `rails/info/routes` path and when rendered from an exception. This is the continuation of #8521 which brought html formatted routes.
In addition to bringing parity to the two views, we're keeping our views DRY by rendering off of the same partials. In this case Railties depends on partials provided by ActionDispatch. I'm open to alternative implementations. Ideally both views will use the same code so any improvements or updates to it will be reproduced on both.
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