Fix rST short header error

Onur R. Bingol · Onur R. Bingol · commit dfa6893364d5 · 2018-01-11T19:15:30.000-06:00
diff --git a/docs/module_vis_base.rst b/docs/module_vis_base.rst
@@ -1,5 +1,5 @@
 Visualization Base Class
-^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 The visualization component in the NURBS-Python package provides an easy way to visualise the surfaces and the 2D/3D
 curves generated using the library. ``VisABC`` provides the abstract base for all visualization components.
