Continued working on typography class and docs
diff --git a/user_guide/libraries/unit_testing.html b/user_guide/libraries/unit_testing.html
index ffb3d95..3763232 100644
--- a/user_guide/libraries/unit_testing.html
+++ b/user_guide/libraries/unit_testing.html
@@ -192,7 +192,7 @@
 

 <div id="footer">

 <p>

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+Previous Topic:&nbsp;&nbsp;<a href="typography.html">Typography Class</a>

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