Corrected line spacing.

docs/source/user_libs_antennas.rst

@@ -8,6 +8,7 @@ Information
 ===========
 
 Author/Contact: Craig Warren (Craig.Warren@ed.ac.uk), University of Edinburgh
+
 License: Creative Commons Attribution-ShareAlike 4.0 International License (http://creativecommons.org/licenses/by-sa/4.0/)
 
 .. code-block:: python