In the Ruby on Rails course, Saving Data section, I opened the routes.rb file to make the changes per the instructions. I then selected the messages_controller.rb file to make the edits there.
When I went back to the routes.rb file, the recently edited contents of this file was overwritten and replaced by all the identical content from the messages_controller.rb file. I
I have already 1) refreshed the page, 2) logged out and then back in, 3) closed all the files and reopened them and 4) used the "Get help -> I want to restart this exercise" to reset all the files. None of these fixed the issue.
I'm using Chrome Version 48.0.2564.116 (64-bit) on a MacBook Air 13.3.
Any help would be greatly appreciated.