\def\@tempa{#1}\ifx\@tempa\q@\@temp#3 \q@\else\@temp{#1} \q@\fi%
\edef\@temp{{\the\linewidth}{@{}p{\the\dimen@}%
@{\extracolsep{\fill}}l@{\extracolsep{0pt}}}}%
\def\@tempa{#1}\ifx\@tempa\q@\@temp#3 \q@\else\@temp{#1} \q@\fi%
\edef\@temp{{\the\linewidth}{@{}p{\the\dimen@}%
@{\extracolsep{\fill}}l@{\extracolsep{0pt}}}}%