doc: fix rest styling

Author: satra

Diff for: doc/quickstart.rst

@@ -24,10 +24,7 @@ How should I ask questions or report bugs?
 
 * If you find a bug or a suggestion for improvement report it here: `GitHub Issues <https://github.com/nipy/nipype/issues>`_
 * If you have a conceptual or clarification question ask it here: `Neurostars <https://neurostars.org/>`_
-* If you want to hangout with developers, you can use either::
-
-    `Gitter <https://gitter.im/nipy/nipype>`_
-    `Slack <https://brainhack.slack.com/messages/C1FR76RAL>`_
+* If you want to hangout with developers, you can use either `Gitter <https://gitter.im/nipy/nipype>`_ or `Slack <https://brainhack.slack.com/messages/C1FR76RAL>`_
 
 Nipype workshop materials
 =========================