*: 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/pkg/fsquota/quotactl/quotactl.go b/metropolis/pkg/fsquota/quotactl/quotactl.go
index a2edfa7..337daaa 100644
--- a/metropolis/pkg/fsquota/quotactl/quotactl.go
+++ b/metropolis/pkg/fsquota/quotactl/quotactl.go
@@ -14,9 +14,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package quotactl implements a low-level wrapper around the modern portion of Linux's
-// quotactl() syscall. See the fsquota package for a nicer interface to the most common part
-// of this API.
+// Package quotactl implements a low-level wrapper around the modern portion of
+// Linux's quotactl() syscall. See the fsquota package for a nicer interface to
+// the most common part of this API.
 package quotactl
 
 import (
@@ -212,7 +212,8 @@
 	return nil
 }
 
-// Sync syncs disk copy of filesystems quotas. If device is empty it syncs all filesystems.
+// Sync syncs disk copy of filesystems quotas. If device is empty it syncs all
+// filesystems.
 func Sync(device string) error {
 	if device != "" {
 		devArg, err := unix.BytePtrFromString(device)