Fix indent

Author: hollasch

books/RayTracingInOneWeekend.html

@@ -1462,21 +1462,20 @@
                 vec3 refracted;
 
                 if (dot(r_in.direction(), rec.normal) > 0) {
-                     outward_normal = -rec.normal;
-                     ni_over_nt = ref_idx;
+                    outward_normal = -rec.normal;
+                    ni_over_nt = ref_idx;
                 }
                 else {
-                     outward_normal = rec.normal;
-                     ni_over_nt = 1.0 / ref_idx;
+                    outward_normal = rec.normal;
+                    ni_over_nt = 1.0 / ref_idx;
                 }
 
                 if (refract(r_in.direction(), outward_normal, ni_over_nt, refracted)) {
-
-                   scattered = ray(rec.p, refracted);
+                    scattered = ray(rec.p, refracted);
                 }
                 else {
-                   scattered = ray(rec.p, reflected);
-                   return false;
+                    scattered = ray(rec.p, reflected);
+                    return false;
                 }
 
                 return true;