a bit of javascript to be used as a bookmarklet to add :hover styles to the Rails 4.x routes listing page
- for modern browsers that can support bookmarklets.
for reference:
- [Create Bookmarklets - The Right Way] (http://code.tutsplus.com/tutorials/create-bookmarklets-the-right-way--net-18154)
- [JQuery Bookmarklet] (http://benalman.com/projects/run-jquery-code-bookmarklet)