all: go fmt std cmd (but revert vendor)

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

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

Change-Id: Ia0534360e4957e58cd9a18429c39d0e32a6addb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/294430
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>

13 files changed, 13 insertions, 0 deletions

diff --git a/src/math/big/arith_amd64.go b/src/math/big/arith_amd64.go
index 1d2d37cf93..89108fe149 100644
--- a/src/math/big/arith_amd64.go
+++ b/src/math/big/arith_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 !math_big_pure_go
 // +build !math_big_pure_go
 
 package big
diff --git a/src/math/big/arith_decl.go b/src/math/big/arith_decl.go
index d519bdc87b..eea3d6b325 100644
--- a/src/math/big/arith_decl.go
+++ b/src/math/big/arith_decl.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 !math_big_pure_go
 // +build !math_big_pure_go
 
 package big
diff --git a/src/math/big/arith_decl_pure.go b/src/math/big/arith_decl_pure.go
index 5faa3bd281..059f6f1325 100644
--- a/src/math/big/arith_decl_pure.go
+++ b/src/math/big/arith_decl_pure.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 math_big_pure_go
 // +build math_big_pure_go
 
 package big
diff --git a/src/math/big/arith_decl_s390x.go b/src/math/big/arith_decl_s390x.go
index f1a69e1df0..4193f3231c 100644
--- a/src/math/big/arith_decl_s390x.go
+++ b/src/math/big/arith_decl_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 !math_big_pure_go
 // +build !math_big_pure_go
 
 package big
diff --git a/src/math/big/arith_s390x_test.go b/src/math/big/arith_s390x_test.go
index ce6bca8885..8375ddbdd4 100644
--- a/src/math/big/arith_s390x_test.go
+++ b/src/math/big/arith_s390x_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 s390x && !math_big_pure_go
 // +build s390x,!math_big_pure_go
 
 package big
diff --git a/src/math/bits/bits_errors.go b/src/math/bits/bits_errors.go
index 192b4bee00..61cb5c9457 100644
--- a/src/math/bits/bits_errors.go
+++ b/src/math/bits/bits_errors.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 !compiler_bootstrap
 // +build !compiler_bootstrap
 
 package bits
diff --git a/src/math/bits/bits_errors_bootstrap.go b/src/math/bits/bits_errors_bootstrap.go
index 5df5738848..4d610d33b8 100644
--- a/src/math/bits/bits_errors_bootstrap.go
+++ b/src/math/bits/bits_errors_bootstrap.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 compiler_bootstrap
 // +build compiler_bootstrap
 
 // This version used only for bootstrap (on this path we want
diff --git a/src/math/bits/make_examples.go b/src/math/bits/make_examples.go
index 1d3ad53fe6..ac4004df41 100644
--- a/src/math/bits/make_examples.go
+++ b/src/math/bits/make_examples.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 ignore
 // +build ignore
 
 // This program generates example_test.go.
diff --git a/src/math/bits/make_tables.go b/src/math/bits/make_tables.go
index b068d5e0e3..5ab0b5fc57 100644
--- a/src/math/bits/make_tables.go
+++ b/src/math/bits/make_tables.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 ignore
 // +build ignore
 
 // This program generates bits_tables.go.
diff --git a/src/math/cmplx/huge_test.go b/src/math/cmplx/huge_test.go
index f8e60c265f..78b42316de 100644
--- a/src/math/cmplx/huge_test.go
+++ b/src/math/cmplx/huge_test.go
@@ -5,6 +5,7 @@
 // Disabled for s390x because it uses assembly routines that are not
 // accurate for huge arguments.
 
+//go:build !s390x
 // +build !s390x
 
 package cmplx
diff --git a/src/math/exp_asm.go b/src/math/exp_asm.go
index 8dad3c810b..654ccce481 100644
--- a/src/math/exp_asm.go
+++ b/src/math/exp_asm.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
 // +build amd64
 
 package math
diff --git a/src/math/huge_test.go b/src/math/huge_test.go
index 9448edc339..ec81a4a31d 100644
--- a/src/math/huge_test.go
+++ b/src/math/huge_test.go
@@ -5,6 +5,7 @@
 // Disabled for s390x because it uses assembly routines that are not
 // accurate for huge arguments.
 
+//go:build !s390x
 // +build !s390x
 
 package math_test
diff --git a/src/math/rand/gen_cooked.go b/src/math/rand/gen_cooked.go
index 0afc10d727..7950e09fd7 100644
--- a/src/math/rand/gen_cooked.go
+++ b/src/math/rand/gen_cooked.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 ignore
 // +build ignore
 
 // This program computes the value of rngCooked in rng.go,