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% TUN.TEX
% Marek Ry\'cko
% Macro \tun
% Text UNderline
% version 0.1, 9.10.94
% version 0.3, 1.5.1996
% -- english description
% uses SPLIT
% uses MAP
\newbox\boxA
\newdimen\dimenA
\newdimen\dimenB
\def\tun
%#1%
{\map
{\ifx\mapcur\space
\space
\else
\tunel\mapcur
\fi
}%
%{#1}%
}
\def\tunel
#1% what to underline
{{%
#1%
\setbox\boxA\hbox{#1}%
\dimenA-\tunsep
\dimenB-\dimenA \advance\dimenB\tunwd
\llap{\hbox to\wd\boxA{\hss
\vrule height\dimenA depth\dimenB width\tunfac\wd\boxA
\hss}}%
}}
% default parameters:
% underline separator width
\def\tunsep {.25ex}%
% underline width
\def\tunwd {.09ex}%
% underline factor of letter width:
\def\tunfac {1}%
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