*: 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/node/kubernetes/kubelet.go b/metropolis/node/kubernetes/kubelet.go
index 953a201..d966e5d 100644
--- a/metropolis/node/kubernetes/kubelet.go
+++ b/metropolis/node/kubernetes/kubelet.go
@@ -102,8 +102,8 @@
 			"memory": "300Mi",
 		},
 
-		// We're not going to use this, but let's make it point to a known-empty directory in case anybody manages to
-		// trigger it.
+		// We're not going to use this, but let's make it point to a
+		// known-empty directory in case anybody manages to trigger it.
 		VolumePluginDir: s.EphemeralDirectory.FlexvolumePlugins.FullPath(),
 	}
 }