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% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 9.3.7, p. I-332.
% Original source in file "boxit.TEX", starting line 996.
\wlog{L: "boxing6.tip" ["boxit.TEX," l. 996, p. I-332]}%
% This file DOES belong to format "texip."
\InputD{box-zero.tip}
\InputD{boxing5.tip}
\catcode`\@ = 11
\def\BoxingE #1{%
    \hbox{% 
        \setbox\@BoxingBox = #1%
        \setbox\@BaseLineLeaders = \hbox to \wd\@BoxingBox{%
            \xleaders\hbox to 4pt{%
                \hskip 1pt
                \vrule depth 0.4pt height 0.4pt width 2pt
                \hfil
            }%
            \hfil
        }%
        \ZeroBox{\@BaseLineLeaders}% 
        \ifBulletAndBaseLine
            \box\@BaseLineLeaders
        \fi
        \RulesOnSide
            {\ht\@BoxingBox}%
            {\dp\@BoxingBox}% 
            {\wd\@BoxingBox}% 
        \box\@BoxingBox
    }%
}
\catcode`\@ = 12