deletions | additions       diff --git a/header.tex b/header.tex  index 75d616d..bd39d7c 100644  --- a/header.tex  +++ b/header.tex 
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\usepackage{listings}  \usepackage{comment}  \newcommand{\unit}[1]{\ensuremath{\, \mathrm{#1}}}  % $ m = 5 \unit{kg} $ will render as “m = 5 kg”.