Cleanup based on comments by William Rucklidge

Change-Id: If269ba8e388965a8ea32260fd6f17a133a19ab9b
diff --git a/internal/ceres/visibility.cc b/internal/ceres/visibility.cc
index 8e80fd1..371bdfa 100644
--- a/internal/ceres/visibility.cc
+++ b/internal/ceres/visibility.cc
@@ -139,7 +139,8 @@
     const int count = it->second;
     // Static cast necessary for Windows.
     const double weight = static_cast<double>(count) /
-        (sqrt(static_cast<double>(visibility[camera1].size() * visibility[camera2].size())));
+        (sqrt(static_cast<double>(
+                  visibility[camera1].size() * visibility[camera2].size())));
     graph->AddEdge(camera1, camera2, weight);
   }