update plugin documentation

plugins/available/battery.plugin.bash

@@ -1,11 +1,17 @@
 #!/usr/bin/env bash
 
+cite about-plugin
+about-plugin query and display info about your battery charge level
+
 battery_percentage(){
+  about 'displays battery charge as a percentage of full (100%)'
+  group battery
+
   if command_exists acpi;
   then
     local ACPI_OUTPUT=$(acpi -b)
     case $ACPI_OUTPUT in
-      *" Unknown"*) 
+      *" Unknown"*)
         local PERC_OUTPUT=$(echo $ACPI_OUTPUT | head -c 22 | tail -c 2)
         case $PERC_OUTPUT in
           *%)
@@ -16,7 +22,7 @@ battery_percentage(){
             ;;
         esac
         ;;
-      *" Discharging"*) 
+      *" Discharging"*)
         local PERC_OUTPUT=$(echo $ACPI_OUTPUT | head -c 26 | tail -c 2)
         case $PERC_OUTPUT in
           *%)
@@ -27,7 +33,7 @@ battery_percentage(){
             ;;
         esac
         ;;
-      *" Charging"*) 
+      *" Charging"*)
         local PERC_OUTPUT=$(echo $ACPI_OUTPUT | head -c 23 | tail -c 2)
         case $PERC_OUTPUT in
           *%)
@@ -38,7 +44,7 @@ battery_percentage(){
             ;;
         esac
         ;;
-      *" Full"*) 
+      *" Full"*)
         echo '99'
         ;;
       *)
@@ -52,7 +58,7 @@ battery_percentage(){
     #local IOREG_OUTPUT_10_5=$(ioreg -l | grep -i capacity | grep -v Legacy| tr '\n' ' | ' | awk '{printf("%.2f%%", $14/$7 * 100)}')
     local IOREG_OUTPUT=$(ioreg -n AppleSmartBattery -r | awk '$1~/Capacity/{c[$1]=$3} END{OFMT="%.2f%%"; max=c["\"MaxCapacity\""]; print (max>0? 100*c["\"CurrentCapacity\""]/max: "?")}')
     case $IOREG_OUTPUT in
-      100*) 
+      100*)
         echo '99'
         ;;
       *)
@@ -65,6 +71,9 @@ battery_percentage(){
 }
 
 battery_charge(){
+  about graphical display of your battery charge
+  group battery
+
   # Full char
   local F_C='▸'
   # Depleted char