Update ui.markdown

bloodyKnuckles · bloodyKnuckles · commit f1a01d6c6160 · 2015-01-20T09:26:45.000-06:00
diff --git a/ui.markdown b/ui.markdown
@@ -38,6 +38,7 @@ Looking at the big picture
 
 ### Further Study
 http://www.nngroup.com/articles/usability-101-introduction-to-usability/
+
 http://www.nngroup.com/articles/ten-usability-heuristics/
 
 
