execess space remove

CONTRIBUTING.md

@@ -27,4 +27,4 @@ If you want to contribute to the [linux-insides](https://github.com/0xAX/linux-i
 
 Please, do the actual changes. While you made your changes, I can merge changes from somebody else and your changes can conflict with `master` branch content. Please rebase on master everytime before you're going to push your changes and check that your branch doesn't conflict with `master`.
 
-Thank you.
+Thank you.