*: 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/test/ktest/init/main.go b/metropolis/test/ktest/init/main.go
index 0236531..5523432 100644
--- a/metropolis/test/ktest/init/main.go
+++ b/metropolis/test/ktest/init/main.go
@@ -14,10 +14,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// ktestinit is an init designed to run inside a lightweight VM for running tests in there.
-// It performs basic platform initialization like mounting kernel filesystems and launches the
-// test executable at /tester, passes the exit code back out over the control socket to ktest and
-// then terminates the VM kernel.
+// ktestinit is an init designed to run inside a lightweight VM for running
+// tests in there.  It performs basic platform initialization like mounting
+// kernel filesystems and launches the test executable at /tester, passes the
+// exit code back out over the control socket to ktest and then terminates the
+// default VM kernel.
 package main
 
 import (