deletions | additions       diff --git a/header.tex b/header.tex  index 29fc33a..2e5ef5d 100644  --- a/header.tex  +++ b/header.tex 
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\usepackage{deluxetable}  \usepackage{nicefrac}  \newcommand{\D}{{\mathrm d}}  \newcommand{\DD}{{\,\D\!\!\;}}