[update] : README and document in i3wm

Author: watasuke102

channels/i3/README.md

@@ -225,7 +225,7 @@ Use the Theme Manager described above
 - Change the system settings, such as screen resolution, etc.  
 Use system manager as described above
 - Change the wallpaper  
-Run nitrogen from the launcher or terminal, and select the image to one you like.  
+Run `nitrogen` from the launcher or terminal, and select the image to one you like.  
 If you want to add a wallpaper, click the button on bottom right to open the settings window, and add the folder where the wallpaper is located.
 - Hide the window with the operating instructions  
 Remove `~/.config/conky` , or edit `~/.config/i3/config` and remove line 42 (`exec --no-startup-id conky `)

channels/i3/airootfs.any/usr/share/doc/alter-i3/Document.html

@@ -752,7 +752,7 @@ <h2 id="how-to-change-settings">How to change settings</h2>
 <li>Change the system settings, such as screen resolution, etc.<br>
 Use system manager as described above</li>
 <li>Change the wallpaper<br>
-Run nitrogen from the launcher or terminal, and select the image to one you like.<br>
+Run <code>nitrogen</code> from the launcher or terminal, and select the image to one you like.<br>
 If you want to add a wallpaper, click the button on bottom right to open the settings window, and add the folder where the wallpaper is located.</li>
 <li>Hide the window with the operating instructions<br>
 Remove <code>~/.config/conky</code> , or edit <code>~/.config/i3/config</code> and remove line 42 (<code>exec --no-startup-id conky </code>)</li>