instance method corrections

# File actionpack/lib/action_controller/metal/exceptions.rb, line 41
      def corrections
        if @error.method_name
          maybe_these = @error.routes.named_routes.helper_names.grep(/#{@error.route_name}/)
          maybe_these -= [@error.method_name.to_s] # remove exact match

          maybe_these.sort_by { |n|
            DidYouMean::Jaro.distance(@error.route_name, n)
          }.reverse.first(4)
        else
          []
        end
      end