improve code style

battery-widget/battery.lua

@@ -7,8 +7,8 @@ local watch = require("awful.widget.watch")
 -- Battery 0: Discharging, 75%, 01:51:38 remaining
 -- Battery 0: Charging, 53%, 00:57:43 until charged
 
-local path_to_icons = "/usr/share/icons/Arc/status/symbolic/"
-local username = os.getenv("USER")
+local PATH_TO_ICONS = "/usr/share/icons/Arc/status/symbolic/"
+local USERNAME = os.getenv("USER")
 
 battery_widget = wibox.widget { 
     {
@@ -16,7 +16,7 @@ battery_widget = wibox.widget {
         widget = wibox.widget.imagebox, 
         resize = false
     },
-    layout = wibox.container.margin(brightness_icon, 0, 0, 3),
+    layout = wibox.container.margin(_, 0, 0, 3),
     set_image = function(self, path)
         self.icon.image = path
     end
@@ -41,7 +41,7 @@ watch(
         else
             batteryType = string.format(batteryType,'')
         end
-        widget.image = path_to_icons .. batteryType .. ".svg"
+        widget.image = PATH_TO_ICONS .. batteryType .. ".svg"
 
         -- Update popup text
         -- TODO: Filter long lines
@@ -80,7 +80,7 @@ battery_widget:connect_signal("mouse::leave", function() naughty.destroy(notific
 --[[ Show warning notification ]]
 function show_battery_warning()
     naughty.notify{
-        icon = "/home/" .. username .. "/.config/awesome/nichosi.png",
+        icon = "/home/" .. USERNAME .. "/.config/awesome/nichosi.png",
         icon_size=100,
         text = "Huston, we have a problem",
         title = "Battery is dying",