stop using the deprecated io/ioutil package

Author: web3-bot

fslock_plan9.go

@@ -5,9 +5,9 @@ import "strings"
 // Opening an exclusive-use file returns an error.
 // The expected error strings are:
 //
-//  - "open/create -- file is locked" (cwfs, kfs)
-//  - "exclusive lock" (fossil)
-//  - "exclusive use file already open" (ramfs)
+//   - "open/create -- file is locked" (cwfs, kfs)
+//   - "exclusive lock" (fossil)
+//   - "exclusive use file already open" (ramfs)
 //
 // See https://github.com/golang/go/blob/go1.15rc1/src/cmd/go/internal/lockedfile/lockedfile_plan9.go#L16
 var lockedErrStrings = [...]string{

fslock_test.go

@@ -2,7 +2,6 @@ package fslock_test
 
 import (
 	"bufio"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -117,7 +116,7 @@ func TestLockedByOthers(t *testing.T) {
 		return
 	}
 
-	confdir, err := ioutil.TempDir("", "go-fs-lock-test")
+	confdir, err := os.MkdirTemp("", "go-fs-lock-test")
 	if err != nil {
 		t.Fatalf("creating temporary directory: %v", err)
 	}