Update README.md

Author: msund

README.md

@@ -34,10 +34,11 @@ You can also use Plotly and IPython to make interactive graphs.
 
 - A [demonstration and tutorial](http://nbviewer.ipython.org/7551139) on making interactive graphs with [Plotly](https://plot.ly/) and Julia.
 
-- [Plotly graphs in the Washington Post, embedded as an iframe](www.washingtonpost.com/blogs/wonkblog/wp/2013/06/14/do-low-taxes-on-the-rich-leave-the-middle-class-with-lower-wages/)
+- [Plotly graphs in the Washington Post, embedded as an iframe](www.washingtonpost.com/blogs/wonkblog/wp/2013/06/14/do-low-taxes-on-the-rich-leave-the-middle-class-with-lower-wages/).
 
-Use cases
-_________ 
+
+Use Cases
+------------
 
 - Stats, physics, and sciences, for stats, fits, and functions [beta distribution](https://plot.ly/~jackp/705/)