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: I70526bf588bf4078887e567795867ece785d666b
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/294415
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>

sha3/hashes_generic.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 !gc || purego || !s390x
 // +build !gc purego !s390x
 
 package sha3

sha3/keccakf.go

@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//  +build !amd64 purego !gc
+//go:build !amd64 || purego || !gc
+// +build !amd64 purego !gc
 
 package sha3
 

sha3/keccakf_amd64.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 amd64 && !purego && gc
 // +build amd64,!purego,gc
 
 package sha3

sha3/register.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 go1.4
 // +build go1.4
 
 package sha3

sha3/sha3_s390x.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 gc && !purego
 // +build gc,!purego
 
 package sha3

sha3/shake_generic.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 !gc || purego || !s390x
 // +build !gc purego !s390x
 
 package sha3

sha3/xor.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 (!amd64 && !386 && !ppc64le) || purego
 // +build !amd64,!386,!ppc64le purego
 
 package sha3

sha3/xor_unaligned.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 (amd64 || 386 || ppc64le) && !purego
 // +build amd64 386 ppc64le
 // +build !purego