Merge pull request #729 from RayTracing/fix-727

Improve listing caption for front face tracking

Author: hollasch

books/RayTracingInOneWeekend.html

@@ -1017,7 +1017,8 @@
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++
     };
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    [Listing [hittable-time-side]: <kbd>[hittable.h]</kbd> The hittable class with time and side]
+    [Listing [front-face-tracking]: <kbd>[hittable.h]</kbd>
+        Adding front-face tracking to hit_record]
 
 <div class='together'>
 And then we add the surface side determination to the class: