all: go fmt ./...

Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).

Not strictly necessary but will avoid spurious changes
as files are edited.

Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild

Change-Id: I47e8f2325980dc752951e9ff961e6a6a132d0dd0
Reviewed-on: https://go-review.googlesource.com/c/playground/+/294449
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Author: rsc

client.go

@@ -1,3 +1,4 @@
+//go:build ignore
 // +build ignore
 
 // Copyright 2014 The Go Authors. All rights reserved.