*: reflow comments to 80 characters

This reformats the entire Metropolis codebase to have comments no longer
than 80 characters, implementing CR/66.

This has been done half manually, as we don't have a good integration
between commentwrap/Bazel, but that can be implemented if we decide to
go for this tool/limit.

Change-Id: If1fff0b093ef806f5dc00551c11506e8290379d0
diff --git a/metropolis/vm/smoketest/main.go b/metropolis/vm/smoketest/main.go
index d9ff7e3..a1bd3a2 100644
--- a/metropolis/vm/smoketest/main.go
+++ b/metropolis/vm/smoketest/main.go
@@ -14,8 +14,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// This is a small smoke test which will run in a container on top of Metropolis Kubernetes. It exercises Metropolis'
-// KVM device plugin,
+// This is a small smoke test which will run in a container on top of Metropolis
+// Kubernetes. It exercises Metropolis' KVM device plugin,
 package main
 
 import (