LinearSolver::Summary::status -> LinearSolver::Summary::message.

And a bunch of minor lint cleanups as they showed up.

Change-Id: I430a6b05710923c72daf6a5df4dfcd16fbf44b3a
diff --git a/internal/ceres/line_search_direction.cc b/internal/ceres/line_search_direction.cc
index 0230e8d..a865f11 100644
--- a/internal/ceres/line_search_direction.cc
+++ b/internal/ceres/line_search_direction.cc
@@ -208,7 +208,8 @@
     //
     // [1] Nocedal J, Wright S, Numerical Optimization, 2nd Ed. Springer, 1999.
     //
-    // TODO: Consider using Damped BFGS update instead of skipping update.
+    // TODO(alexs.mac): Consider using Damped BFGS update instead of
+    // skipping update.
     const double kBFGSSecantConditionHessianUpdateTolerance = 1e-14;
     if (delta_x_dot_delta_gradient <=
         kBFGSSecantConditionHessianUpdateTolerance) {