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- \newcommand{\attachment}[1]{%
- % Check to see if #1 is empty (https://tex.stackexchange.com/a/53091/5764)
- \if\relax\detokenize{#1}\relax
- % <empty>
- \else% <not empty>
- \stepcounter{attachment}%
- \listadd{\attachments}{#1}%
- \fi
- }
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