Try using [[ . ]] to quieten shellcheck

Author: manics

ci/summarise-linkcheck-output

@@ -8,12 +8,12 @@ LINKCHECK="$1"
 let N_BROKEN=$(jq -r 'select(.status=="broken") | reduce inputs as $s(0;.+1)' "$LINKCHECK")
 let N_REDIRECTED=$(jq -r 'select(.status=="redirected") | reduce inputs as $s(0;.+1)' "$LINKCHECK")
 
-if [ $N_BROKEN -gt 0 ]; then
+if [[ $N_BROKEN -gt 0 ]]; then
     printf "\n\033[31;1m%s\033[0m\n" "Broken links"
     jq -r 'select(.status=="broken") | "\(.filename):\(.lineno) \(.uri)\n    \(.info)"' "$LINKCHECK"
 fi
 
-if [ $N_REDIRECTED -gt 0 ]; then
+if [[ $N_REDIRECTED -gt 0 ]]; then
     printf "\n\033[35;1m%s\033[0m\n" "Redirected links"
     jq -r 'select(.status=="redirected") | "\(.filename):\(.lineno) \(.uri)\n    \(.code) \(.info)"' "$LINKCHECK"
 fi