class REXML::XMLDecl

def content(enc)
  context = nil
  context = parent.context if parent
  if context and context[:prologue_quote] == :quote
    quote = "\""
  else
    quote = "'"
  end
  rv = "version=#{quote}#{@version}#{quote}"
  if @writeencoding or enc !~ /\Autf-8\z/i
    rv << " encoding=#{quote}#{enc}#{quote}"
  end
  if @standalone
    rv << " standalone=#{quote}#{@standalone}#{quote}"
  end
  rv
end