Lint and other cleanups from William Rucklidge

Change-Id: I7fb23c2db85f0f121204560b79f1966f3d584431
diff --git a/include/ceres/types.h b/include/ceres/types.h
index c8c9cfe..c94bd04 100644
--- a/include/ceres/types.h
+++ b/include/ceres/types.h
@@ -134,7 +134,7 @@
   CANONICAL_VIEWS,
 
   // The classic single linkage algorithm. It is extremely fast as
-  // compared to CANONICAL_VIEWS, but can give slightly poor
+  // compared to CANONICAL_VIEWS, but can give slightly poorer
   // results. For problems with large number of cameras though, this
   // is generally a pretty good option.
   //