posix sh doesn't support \xHH

blocks/battery.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
-ICON="\x0c\x0b"
+ICON=""
 read -r capacity </sys/class/power_supply/BAT0/capacity
 printf "$ICON%s%%" "$capacity"

blocks/calendar.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-ICON="\x0c\x0b"
+ICON=""
 printf "$ICON%s" "$(date '+%a, %b %d, %R')"

blocks/cpu_temp.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 
-ICONn="\x0c\x0b" # icon for normal temperatures
-ICONc="\x0d\x0b" # icon for critical temperatures
+ICONn="" # icon for normal temperatures
+ICONc="
" # icon for critical temperatures
 
 crit=70 # critical temperature