Update README.md

Add line breaks in statuscommand example
(this is officially supported in i3:
https://i3wm.org/docs/userguide.html 4.31. )
this adds a great deal of readability to the config

README.md

@@ -80,7 +80,10 @@ In your i3wm configuration, modify the *status_command* for your i3bar like this
 
 ```
 bar {
-	status_command <path to bumblebee-status/bumblebee-status> -m <list of modules> -p <list of module parameters> -t <theme>
+	status_command <path to bumblebee-status/bumblebee-status> \
+		-m <list of modules> \
+		-p <list of module parameters> \
+		-t <theme>
 }
 ```