Minor reformatting in contributing guide.

docs/CONTRIBUTING.rst

@@ -3,10 +3,10 @@ Welcome, and thank you for your interest in contributing!
 
 If you are looking for a good way to contribute to the Cython project, please
 
-* have a look at the `Cython Hacker Guide <https://github.com/cython/cython/wiki/HackerGuide>`_.
-* especially the section on `getting started <https://github.com/cython/cython/wiki/HackerGuide#getting-started>`_.
+* have a look at the `Cython Hacker Guide <https://github.com/cython/cython/wiki/HackerGuide>`_,
+  especially the section on `getting started <https://github.com/cython/cython/wiki/HackerGuide#getting-started>`_.
 * look through the `issues that need help <https://github.com/cython/cython/issues?q=is%3Aissue+is%3Aopen+view+label%3A%22help+wanted%22>`_.
-* look through the `issues that are a good entry point for beginners <https://github.com/cython/cython/issues?q=is%3Aissue+is%3Aopen+view+label%3A%22good+first+issue%22>`_
+* look through the `issues that are a good entry point for beginners <https://github.com/cython/cython/issues?q=is%3Aissue+is%3Aopen+view+label%3A%22good+first+issue%22>`_.
 * ask on the `core developers mailing list <https://mail.python.org/mailman/listinfo/cython-devel>`_ for guidance.
 
 If you have code that you want to contribute, please make sure that it