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: Ib6eba20f6109a9dc1004dd5b802838e765e4622b
Reviewed-on: https://go-review.googlesource.com/c/dl/+/294423
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>

internal/genv/main.go

diff --git a/internal/genv/main.go b/internal/genv/main.go
index 37e035d..dd19223 100644
--- a/internal/genv/main.go
+++ b/internal/genv/main.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.13
 // +build go1.13
 
 // The genv command generates version-specific go command source files.

internal/genv/main_test.go

diff --git a/internal/genv/main_test.go b/internal/genv/main_test.go
index ecffed2..6b25e91 100644
--- a/internal/genv/main_test.go
+++ b/internal/genv/main_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.13
 // +build go1.13
 
 package main