def msgid_plural
      begin
        if @scanner.scan(/msgid_plural/)
          skip_whitespace
          text = message_line
          add_result(:msgid_plural, text)
          message_multiline(:msgid_plural) if text.empty?
          true
        else
          false
        end
      rescue PoSyntaxError => pe
        raise PoSyntaxError, "Syntax error in msgid\n" + pe.message, pe.backtrace
      end
    end
def msgid_plural
      begin
        if @scanner.scan(/msgid_plural/)
          skip_whitespace
          text = message_line
          add_result(:msgid_plural, text)
          message_multiline(:msgid_plural) if text.empty?
          true
        else
          false
        end
      rescue PoSyntaxError => pe
        raise PoSyntaxError, "Syntax error in msgid\n" + pe.message, pe.backtrace
      end
    end
matches the msgid_plural line.

 msgid_plural is optional

 @return [boolean] true if msgid_plural is present, false otherwise