Update README.md

Fixed formatting of README.md

README.md

@@ -4,10 +4,11 @@ Emacs mode for kamailio.cfg syntax highlighting and indentation
 - Save kamailio-mode.el somewhere in your file system.
 
 - Load the module in your Emacs Initialization File:
-
+```
 (load "path_to_kamalio-mode.el")
-
+```
 - To activate the mode, tell it on the first nonblank line of your
   kamailio.cfg file, for example:
-
+```
 # -*- mode: kamailio; tab-width: 4; c-basic-offset: 4; -*-
+```