merge_enums

# File lib/rdoc/ri/driver.rb, line 43
    def merge_enums(other)
      other.each do |k, v|
        if self[k] then
          case v
          when Array then
            # HACK dunno
            if String === self[k] and self[k].empty? then
              self[k] = v
            else
              self[k] += v
            end
          when Hash then
            self[k].update v
          else
            # do nothing
          end
        else
          self[k] = v
        end
      end
    end