xmldecl

# File lib/rss/rss.rb, line 1323
    def xmldecl
      rv = %[<?xml version="#{@version}"]
      if @output_encoding or @encoding
        rv << %[ encoding="#{@output_encoding or @encoding}"]
      end
      rv << %[ standalone="yes"] if @standalone
      rv << "?>\n"
      rv
    end