Minor fix for usage.md

src/content/docs/en/i-i/02.usage.md

@@ -34,6 +34,8 @@ Press `Super` or `Super`+`Tab` to open.
 - Brightness: Scroll top-left corner
 - Launcher: Middle-click workspace widget
 - Virtual keyboard: Right-click workspace widget
+- Copy text in notification: Click and hold for around 800ms (reference: [#224](https://github.com/end-4/dots-hyprland/issues/224#issuecomment-1923706599))
+
 
 # Workspace Groups
 
@@ -129,9 +131,6 @@ However, we have managed to reduce the complexity of some common configurations,
 :::note
 For configs that are not limited to AGS, see the "Misc" section.
 :::
-## Copy text in notification
-Click and hold for around 800ms (reference: [#224](https://github.com/end-4/dots-hyprland/issues/224#issuecomment-1923706599))
-
 ## Set city for weather widget
 The city is detected by `curl ipinfo.io` by default, or readed from the env var `$AGS_WEATHER_CITY` if set.
 
@@ -155,6 +154,14 @@ available=$(echo "$disk_info" | awk 'NR==2 {print $4}')
 total=$(echo "$disk_info" | awk 'NR==2 {print $2}')
 echo "$available/$total"
 ```
+:::tip
+The example is written as easy to read and modify.
+However, same functionality can be achieved in 2 lines:
+```bash title="~/.cache/ags/user/scripts/custom-module-poll.sh"
+#!/bin/bash
+LANG=C df -h / | awk 'NR==2 {printf "%.0fG/%.0fT\n", $4, $2}'
+```
+:::
 Remember to set execution permission:
 ```bash
 chmod +x ~/.cache/ags/user/scripts/*.sh