I couldn't find any change to scope in the release notes or changelog but this stopped working since Rails 3:
scope format: false do
get "main/index"
end
This works though:
get "main/index", format: false
In the first case, using Rails 4 beta 1, getting /main/index.html will work while in the second it won't, as expected.
Should I create an issue on GH for this?