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\vfil\break
\tocentry{Index of control sequences, parameters, and
special symbols}\tocidx{}

%\def\indexentry#1#2{#1\hfill #2}
%

\newbox\indexbox
\newbox\leftcol
\newbox\rightcol


\def\beginindexbox{%
   \setbox\indexbox=\vbox\bgroup\parskip=0pt plus .4pt
      \everypar={\hangindent=1em \hangafter=1}%
      \linepenalty=200 \hsize=.45\hsize \rightskip=0pt plus 1em
      \parindent=0pt
      \obeylines}
\let\endindexbox\egroup

\beginindexbox%
\obeylines\input ./0-index.tex
\endindexbox

\splittopskip=0pt
\dimpubb=\dimexpr \vsize -55pt \relax
\dimpuba=\dimexpr \vsize -10pt \relax

\def\firstpage{\setbox\leftcol=\vsplit\indexbox to \dimpubb
   \setbox\rightcol=\vsplit\indexbox to \dimpubb
   \line{\vtop{\vskip\splittopskip\unvbox\leftcol}\hfil
      \vtop{\unvbox\rightcol}}%
   \vfil\break
}
\def\fullpage{\setbox\leftcol=\vsplit\indexbox to \dimpuba
   \setbox\rightcol=\vsplit\indexbox to \dimpuba
   \line{\vtop{\vskip\splittopskip\unvbox\leftcol}\hfil
      \vtop{\unvbox\rightcol}}
   \vfil\break
}
\def\lastpage{%
   \setbox\leftcol=\vsplit\indexbox to .54\ht\indexbox
   \setbox\rightcol=\vsplit\indexbox to \ht\indexbox
   \line{\vtop{\vskip\splittopskip\unvbox\leftcol}\hfil
      \vtop{\unvbox\rightcol}}%
}


\vfil\eject
\xdef\sectiontitle{Index}%
\leavevmode\vskip-1ex
\centerline{\sectiontitlefont Index of control sequences,
parameters, and special symbols\qquad}
\bigskip

\firstpage
\lastpage

\endinput