handle

# File lib/rdoc/markup/preprocess.rb, line 19
  def handle(text)
    text.gsub!(/^([ \t]*#?[ \t]*):(\w+):([ \t]*)(.+)?\n/) do
      next $& if $3.empty? and $4 and $4[0, 1] == ':'

      prefix    = $1
      directive = $2.downcase
      param     = $4

      case directive
      when 'include' then
        filename = param.split[0]
        include_file filename, prefix

      else
        result = yield directive, param
        result = "#{prefix}:#{directive}: #{param}\n" unless result
        result
      end
    end
  end