def sep
      if scope == :class
        namespace && namespace != YARD::Registry.root ? CSEP : NSEP
      else
        ISEP
      end
    end
def sep
      if scope == :class
        namespace && namespace != YARD::Registry.root ? CSEP : NSEP
      else
        ISEP
      end
    end
Override separator to differentiate between class and instance
 methods.
 @return [String] "#" for an instance method, "." for class