Fix alternating row colors in array/matrix.

Prevent `\rowcolors` in longtable from contaminating array/matrix environments in math mode.

eisvogel.tex

@@ -544,14 +544,15 @@ $if(tables)$
 \arrayrulecolor{table-rule-color}     % color of \toprule, \midrule, \bottomrule
 \setlength\heavyrulewidth{0.3ex}      % thickness of \toprule, \bottomrule
 \renewcommand{\arraystretch}{1.3}     % spacing (padding)
-\rowcolors{3}{}{table-row-color!100}  % row color
 
 % Reset rownum counter so that each table
 % starts with the same row colors.
 % https://tex.stackexchange.com/questions/170637/restarting-rowcolors
 \let\oldlongtable\longtable
 \let\endoldlongtable\endlongtable
-\renewenvironment{longtable}{\oldlongtable} {
+\renewenvironment{longtable}{
+\rowcolors{3}{}{table-row-color!100}  % row color
+\oldlongtable} {
 \endoldlongtable
 \global\rownum=0\relax}