all: update references to symbols moved from io/ioutil to io

Update references missed in CL 263142.

For #41190

Change-Id: I778760a6a69bd0440fec0848bdef539c9ccb4ee1
GitHub-Last-Rev: dda42b09fff36dc08ec1cdec50cc19e3da5058e5
GitHub-Pull-Request: golang/go#42874
Reviewed-on: https://go-review.googlesource.com/c/go/+/273946
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Zhang <cherryyz@google.com>

5 files changed, 6 insertions, 9 deletions

diff --git a/src/go/build/build.go b/src/go/build/build.go
index 0732f6aa19..501ce2e8dd 100644
--- a/src/go/build/build.go
+++ b/src/go/build/build.go
@@ -188,6 +188,7 @@ func (ctxt *Context) readDir(path string) ([]fs.FileInfo, error) {
 	if f := ctxt.ReadDir; f != nil {
 		return f(path)
 	}
+	// TODO: use os.ReadDir
 	return ioutil.ReadDir(path)
 }
 
diff --git a/src/internal/execabs/execabs_test.go b/src/internal/execabs/execabs_test.go
index b71458587c..7609b2106a 100644
--- a/src/internal/execabs/execabs_test.go
+++ b/src/internal/execabs/execabs_test.go
@@ -8,7 +8,6 @@ import (
 	"context"
 	"fmt"
 	"internal/testenv"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -42,7 +41,7 @@ func TestCommand(t *testing.T) {
 		if runtime.GOOS == "windows" {
 			executable += ".exe"
 		}
-		if err := ioutil.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil {
+		if err := os.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil {
 			t.Fatalf("ioutil.WriteFile failed: %s", err)
 		}
 		cwd, err := os.Getwd()
@@ -77,7 +76,7 @@ func TestLookPath(t *testing.T) {
 	if runtime.GOOS == "windows" {
 		executable += ".exe"
 	}
-	if err := ioutil.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil {
+	if err := os.WriteFile(filepath.Join(tmpDir, executable), []byte{1, 2, 3}, 0111); err != nil {
 		t.Fatalf("ioutil.WriteFile failed: %s", err)
 	}
 	cwd, err := os.Getwd()
diff --git a/src/net/http/fs_test.go b/src/net/http/fs_test.go
index 2499051625..0ebb511b5c 100644
--- a/src/net/http/fs_test.go
+++ b/src/net/http/fs_test.go
@@ -11,7 +11,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"mime"
 	"mime/multipart"
 	"net"
@@ -593,7 +592,7 @@ func TestServeIndexHtml(t *testing.T) {
 				if err != nil {
 					t.Fatal(err)
 				}
-				b, err := ioutil.ReadAll(res.Body)
+				b, err := io.ReadAll(res.Body)
 				if err != nil {
 					t.Fatal("reading Body:", err)
 				}
diff --git a/src/syscall/exec_windows_test.go b/src/syscall/exec_windows_test.go
index aeafb564b3..8b8f330e99 100644
--- a/src/syscall/exec_windows_test.go
+++ b/src/syscall/exec_windows_test.go
@@ -6,7 +6,6 @@ package syscall_test
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -106,7 +105,7 @@ func TestChangingProcessParent(t *testing.T) {
 	if err != nil {
 		t.Errorf("child failed: %v: %v", err, string(childOutput))
 	}
-	childOutput, err = ioutil.ReadFile(childDumpPath)
+	childOutput, err = os.ReadFile(childDumpPath)
 	if err != nil {
 		t.Fatalf("reading child output failed: %v", err)
 	}
diff --git a/src/testing/fstest/testfs.go b/src/testing/fstest/testfs.go
index e0ad60a17b..80ca0e9a1d 100644
--- a/src/testing/fstest/testfs.go
+++ b/src/testing/fstest/testfs.go
@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"path"
 	"reflect"
 	"sort"
@@ -514,7 +513,7 @@ func (t *fsTester) checkFile(file string) {
 		return
 	}
 
-	data, err := ioutil.ReadAll(f)
+	data, err := io.ReadAll(f)
 	if err != nil {
 		f.Close()
 		t.errorf("%s: Open+ReadAll: %v", file, err)