isrunning-service: fix shellcheck

Author: x70b1

polybar-scripts/isrunning-service/isrunning-service.sh

@@ -1,9 +1,10 @@
 #!/bin/sh
+# shellcheck disable=SC2034
 
 UNIT="docker.service"
 
-journalctl --follow -o cat --unit $UNIT | while read -r; do
-	if [ "$(systemctl is-active "$UNIT")" = "active" ]; then
+journalctl --follow -o cat --unit $UNIT | while read -r line; do
+    if [ "$(systemctl is-active "$UNIT")" = "active" ]; then
         echo "#1"
     else
         echo "#2"