Fix tests, when creating rescue handler, we need to check for arity now

Before it was handled by Proc.bind, but since Proc.bind has been
deprecated, this is no longer the case and returned handler
needs to match rescuer.

activesupport/lib/active_support/rescuable.rb

@@ -108,7 +108,11 @@ module ActiveSupport
       when Symbol
         method(rescuer)
       when Proc
-        Proc.new { |*args| instance_exec(*args, &rescuer) }
+        if rescuer.arity == 0
+          Proc.new { instance_exec(&rescuer) }
+        else
+          Proc.new { |exception| instance_exec(exception, &rescuer) }
+        end
       end
     end
   end