integration(-cli): remove some redundant formatting

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

integration-cli/docker_cli_inspect_test.go

@@ -135,7 +135,7 @@ func (s *DockerCLIInspectSuite) TestInspectTypeFlagWithInvalidValue(c *testing.T
 
 	out, exitCode, err := dockerCmdWithError("inspect", "--type=foobar", "busybox")
 	assert.Assert(c, err != nil, "%d", exitCode)
-	assert.Equal(c, exitCode, 1, fmt.Sprintf("%s", err))
+	assert.Equal(c, exitCode, 1, err)
 	assert.Assert(c, strings.Contains(out, "not a valid value for --type"))
 }
 

integration/container/checkpoint_test.go

@@ -2,7 +2,6 @@ package container // import "github.com/docker/docker/integration/container"
 
 import (
 	"context"
-	"fmt"
 	"os/exec"
 	"regexp"
 	"sort"
@@ -84,9 +83,9 @@ func TestCheckpoint(t *testing.T) {
 	err = client.CheckpointCreate(ctx, cID, cptOpt)
 	if err != nil {
 		// An error can contain a path to a dump file
-		t.Logf("%s", err)
+		t.Log(err)
 		re := regexp.MustCompile("path= (.*): ")
-		m := re.FindStringSubmatch(fmt.Sprintf("%s", err))
+		m := re.FindStringSubmatch(err.Error())
 		if len(m) >= 2 {
 			dumpLog := m[1]
 			t.Logf("%s", dumpLog)