Ensure that we don't get duplicated footnotes when
a note occurs in a header cell and \endfirsthead
is used.
% pandoc -t latex | x | y[^fn] | |-|-| |1|2| : a table [^fn]: a footnote ^D \begin{longtable}[]{@{}ll@{}} \caption{a table}\tabularnewline \toprule x & y\footnote{a footnote}\tabularnewline \midrule \endfirsthead \toprule x & y{}\tabularnewline \midrule \endhead 1 & 2\tabularnewline \bottomrule \end{longtable}