[master] golang format tools (#1457)
[master] golang format tools (#1457)

Produced via:
  `gofmt -s -w $(find -path './vendor' -prune -o -path './third_party' -prune -o -name '*.pb.go' -prune -o -type f -name '*.go' -print)`
  `goimports -w $(find -name '*.go' | grep -v vendor | grep -v third_party | grep -v .pb.go | grep -v wire_gen.go)`
/assign grantr lberk n3wscott
/cc grantr lberk n3wscott
knative-sandbox/eventing-couchdb,knative-sandbox/eventing-gitlab,knative-sandbox/eventing-natss,knative-sandbox/eventing-ceph,knative-sandbox/eventing-github,knative-sandbox/eventing-camel,knative-sandbox/eventing-awssqs,knative-sandbox/eventing-camel,knative/eventing-contrib,knative-sandbox/eventing-ceph,knative-sandbox/eventing-natss,knative-sandbox/eventing-awssqs,knative-sandbox/eventing-prometheus,knative-sandbox/eventing-kafka,knative-sandbox/eventing-github,knative/eventing-contrib,knative-sandbox/eventing-gitlab,knative-sandbox/eventing-couchdb,knative-sandbox/eventing-kafka,knative-sandbox/eventing-prometheus