…fined by Active Support) Selecting which key extensions to include in active_support/rails made apparent the systematic usage of Object#in? in the code base. After some discussion in 5ea6b0d we decided to remove it and use plain Ruby, which seems enough for this particular idiom. In this commit the refactor has been made case by case. Sometimes include? is the natural alternative, others a simple || is the way you actually spell the condition in your head, others a case statement seems more appropriate. I have chosen the one I liked the most in each case.