*: 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/build/fietsje/main.go b/build/fietsje/main.go
index 50055ab..4473483 100644
--- a/build/fietsje/main.go
+++ b/build/fietsje/main.go
@@ -53,8 +53,8 @@
 		shelf: shelf,
 	}
 
-	// Currently can't bump past v1.30.0, as that removes the old balancer.Picker API that
-	// go-etcd depends upon. See https://github.com/etcd-io/etcd/pull/12398 .
+	// Currently can't bump past v1.30.0, as that removes the old balancer.Picker API
+	// that go-etcd depends upon. See https://github.com/etcd-io/etcd/pull/12398 .
 	p.collect(
 		"google.golang.org/grpc", "v1.29.1",
 	).use(
@@ -147,8 +147,9 @@
 		"github.com/muesli/reflow",
 	)
 
-	// First generate the repositories starlark rule into memory. This is because rendering will lock all unlocked
-	// dependencies, which might take a while. If a use were to interrupt it now, they would end up with an incomplete
+	// First generate the repositories starlark rule into memory. This is because
+	// rendering will lock all unlocked dependencies, which might take a while. If a
+	// use were to interrupt it now, they would end up with an incomplete
 	// repositories.bzl and would have to restore from git.
 	buf := bytes.NewBuffer(nil)
 	err = p.render(buf)