class Haml::Parser

def plain(text, escape_html = nil)
  if block_opened?
    raise SyntaxError.new(Error.message(:illegal_nesting_plain), @next_line.index)
  end
  unless contains_interpolation?(text)
    return ParseNode.new(:plain, @index, :text => text)
  end
  escape_html = @options[:escape_html] if escape_html.nil?
  script(unescape_interpolation(text, escape_html), false)
end