rebuild with pandoc 2.8, pandoc-types 1.20, doctemplates 0.7.1, HsYAML 0.2.1.0, haddock-library 1.8.0, texmath 0.12, base-compat 0.11.0, base-compat-batteries 0.11.0, optparse-applicative 0.15.1.0

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u