Update README.md

Author: BhumikaSaini

README.md

@@ -22,8 +22,10 @@ Building the virtual machine is this easy:
     host $ cd rails-dev-box
     host $ vagrant up
 
-(If prompted for login credentials in the **VirtualBox VM**, use:  
-**Username:** vagrant **Password:** vagrant)
+If prompted for login credentials in the **VirtualBox VM**, use:  
+  
+**Username:** `vagrant`  
+**Password:** `vagrant`
 
 That's it.