highlihgt code

CONTRIBUTING.md

@@ -72,10 +72,15 @@ You can also send a mail to the [owncloud-devel mailing list](https://mailman.ow
 
 * Use 4 spaces for indention
 * Place the open curly braces on the same line as the parameter block, e.g.:
-
+  ```php
   if (condition) {
+      // code
+  } else {
+      // code
+  }
+  ```
 
-* place a space before and after the parameter block for if, else, for, foreach, function
+* Place a space before and after the parameter block for if, else, for, foreach, function
 
 ### Project structure
 The project is structured in the following way: