Fixed a web address

README.md

@@ -29,7 +29,7 @@ Use arrow keys to move and "wasd" to rotate the camera. "q" and "e" roll the cam
 * Vi Hart, Andrea Hawksley, Elisabetta A. Matsumoto, and Henry Segerman. Non-euclidean virtual reality II: explorations of H3. In Proc. Bridges 2017, pages 33-40. Tessellations Publishing, 2017.
 * Vi Hart, Andrea Hawksley, Elisabetta A. Matsumoto, and Henry Segerman. Non-euclidean virtual reality II: explorations of H2 × E. In Proc. Bridges 2017, pages 41-48. Tessellations Publishing, 2017.
 * Vi Hart, Andrea Hawksley, Henry Segerman, and Marc ten Bosch. Hypernom: Mapping VR headset orientation to S3. In Proc. Bridges 2015, pages 387–390. Tessellations Publishing, 2015.
-* Jeff Weeks. Curved Spaces. a flight simulator for multiconnected universes, available from http://www. geometrygames.org/CurvedSpaces/.
+* Jeff Weeks. Curved Spaces. a flight simulator for multiconnected universes, available from http://www.geometrygames.org/CurvedSpaces/.
 * Jeff Weeks. Real-time rendering in curved spaces. IEEE Computer Graphics and Applications, 22(6):90–99, 2002.
 * Charles Gunn, Discrete groups and visualization of three-dimensional manifolds, Proceedings of the 20th annual conference on computer graphics and interactive techniques, 1993, pp. 255–262.
 * Charles Gunn, Advances in metric-neutral visualization, Proceedings of gravisma 2010, 2010, pp. 17–26.