add missing end tag

Author: sloriot

Installation/changes.html

@@ -266,7 +266,7 @@ <h3>General</h3>
   <h3>Approximation of Ridges and Umbilics on Triangulated Surface Meshes</h3>
   <ul>
     <li> This package now supports any model of the
-      concept <code>FaceGraph</code>.
+      concept <code>FaceGraph</code>.</li>
     <li> <b>Breaking change:</b> The package no longer supports models
       of <code>TriangulatedSurfaceMesh</code> which are not at the same
       time models of the concept <code>FaceGraph</code>.