xmldecl

# File lib/rss/rss.rb, line 1311
    def xmldecl
      rv = %Q[<?xml version="#{@version}"]
      if @output_encoding or @encoding
        rv << %Q[ encoding="#{@output_encoding or @encoding}"]
      end
      rv << %Q[ standalone="yes"] if @standalone
      rv << "?>\n"
      rv
    end