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%%%%%%%%%1%%%%%%%%%2%%%%%%%%%3%%%%%%%%%4%%%%%%%%%5
%% Bundled source file for the VERTBARS package
%%-------1---------2---------3---------4---------5
%% Please see the accompanying README for author,
%% license, documentation and installation information
%%%%%%%%%1%%%%%%%%%2%%%%%%%%%3%%%%%%%%%4%%%%%%%%%5
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{vertbars}[2018/12/16 v1.0c vertical bars in the margin]
\newcommand{\LNenv}{runninglinenumbers}
\DeclareOption{switch}{%
\renewcommand{\LNenv}{runningpagewiselinenumbers}
\PassOptionsToPackage{\CurrentOption}{lineno}
}
\DeclareOption{switch*}{%
\renewcommand{\LNenv}{runningpagewiselinenumbers}
\PassOptionsToPackage{\CurrentOption}{lineno}
}
\DeclareOption*{\PassOptionsToPackage{\CurrentOption}{lineno}}
\ProcessOptions\relax
\RequirePackage{lineno}
% Code to add stuff at start and end of a pre-existing zero argument macro:
\newcommand{\addtodef}[3]{\begingroup
\@temptokena{#2}%
\toks@\expandafter{#1#3}%
\edef\x{\endgroup
\def\noexpand#1{\the\@temptokena \the\toks@}}%
\x
}
% It's useful to preserve \cmd\baselineskip:
\newlength{\pwvbbl}
\setlength{\pwvbbl}{\baselineskip}
% Width of bars:
\newlength{\barwidth}
\setlength{\barwidth}{0.4pt}
% Horizontal space between bars:
\newlength{\barspace}
\setlength{\barspace}{0.5\linenumbersep}
\newcommand{\addtomakeLNL}{{\rule[-0.25\pwvbbl]{\barwidth}{1.1\pwvbbl}\hskip\barspace\relax}}
\newcommand{\pwvbLNL}{}
\newenvironment{vertbar}{%
\par
\pagewiselinenumbers
\begin{\LNenv}%
\addtodef{\pwvbLNL}{}{\addtomakeLNL}%
\let\LineNumber\pwvbLNL
}{%
\end{\LNenv}%
\par
}
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