Row coloring too wide (Pandoc MD -> PDF)
like this:
i extract from yours code minimal working example, where i add code which should solve your problem:
\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{booktabs, longtable}
\begin{document}
\begin{longtable}{@{} >{\columncolor{white}[0pt][\tabcolsep]}r % <---
l
l
>{\columncolor{white}[\tabcolsep][0pt]}c % <---
@{} }
\caption{Demonstration of pipe table syntax.}\\
\toprule
Right & Left & Default & Center \\
\midrule
\endfirsthead
\toprule
Right & Left & Default & Center \\
\midrule
\endhead
\rowcolor{gray!10}
12 & 12 & 12 & 12 \\
123 & 123 & 123 & 123 \\
1 & 1 & 1 & 1 \\
\bottomrule
\end{longtable}
\end{document}