fish: repaint after battery function

fish/functions/battery.fish

@@ -1,9 +1,7 @@
 function battery --description "Print battery status"
     if test (uname -s) != Darwin
         echo "Unsupported kernel: "(uname -s)
-        return 1
-    end
-
+    else
         set --local battery_status (pmset -g batt | string split0)
         set --local battery_charge (echo $battery_status | rg --only-matching "\d+%")
         set --local power_source (echo $battery_status | rg --only-matching  "[A-Za-z]+\sPower")
@@ -11,5 +9,9 @@ function battery --description "Print battery status"
         set_color green
         echo "⚡️ Running on $power_source with $battery_charge charge"
         set_color normal
+    end
+
+    # Repaint is needed since there is a keybinding for this function
+    # See fish_user_key_bindings.fish
     commandline -f repaint
 end