fix(battery): force battery percentage as integer

plugins/battery/battery.plugin.zsh

@@ -153,7 +153,7 @@ elif [[ "$OSTYPE" = linux*  ]]; then
       #   Battery #1     : Unknown, 99.55%
       #   Battery #2     : Discharging, 49.58%, 01:12:05
       #   All batteries  : 62.60%, 02:03:03
-      acpitool 2>/dev/null | command awk -F, '
+      local -i pct=$(acpitool 2>/dev/null | command awk -F, '
         /^\s+All batteries/ {
           gsub(/[^0-9.]/, "", $1)
           pct=$1
@@ -164,7 +164,8 @@ elif [[ "$OSTYPE" = linux*  ]]; then
           pct=$2
         }
         END { print pct }
-        '
+        ')
+      echo $pct
     elif (( $+commands[acpi] )); then
       # Sample output:
       # Battery 0: Discharging, 0%, rate information unavailable
@@ -227,7 +228,7 @@ function battery_level_gauge() {
   local charging_color=${BATTERY_CHARGING_COLOR:-$color_yellow}
   local charging_symbol=${BATTERY_CHARGING_SYMBOL:-'⚡'}
 
-  local battery_remaining_percentage=$(battery_pct)
+  local -i battery_remaining_percentage=$(battery_pct)
   local filled empty gauge_color
 
   if [[ $battery_remaining_percentage =~ [0-9]+ ]]; then