Specify `lua` in markdown

README.md

@@ -88,14 +88,18 @@ Add the following to your `~/.config/awesome/rc.lua`:
 
 Require the module:
 
+```lua
 -- require *after* `beautiful.init` or the theme will be inconsistent!
 local connman = require("connman_widget")
 -- override the GUI client.
 connman.gui_client = "wicd"
+```
 
 Add the widget to your layout:
 
+```lua
 right_layout:add(connman)
+```
 
 # Limitations