Fix too many arguments

drivers/docker/driver.go

@@ -636,7 +636,7 @@ func (d *Driver) containerBinds(task *drivers.TaskConfig, driverConfig *TaskConf
 		// Otherwise, we assume we receive a relative path binding in the format
 		// relative/to/task:/also/in/container
 		if taskLocalBindVolume {
-			src = expandPath(task.TaskDir().Dir, src, runtime.GOOS)
+			src = expandPath(task.TaskDir().Dir, src)
 		} else {
 			// Resolve dotted path segments
 			src = filepath.Clean(src)

drivers/docker/utils.go

@@ -7,6 +7,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	"regexp"
+	"runtime"
 	"strings"
 
 	"github.com/docker/cli/cli/config/configfile"
@@ -207,7 +208,7 @@ func validateCgroupPermission(s string) bool {
 // expandPath returns the absolute path of dir, relative to base if dir is relative path.
 // base is expected to be an absolute path
 func expandPath(base, dir string) string {
-	if os == "windows" {
+	if runtime.GOOS == "windows" {
 		pipeExp := regexp.MustCompile(`^` + rxPipe + `$`)
 		match := pipeExp.FindStringSubmatch(strings.ToLower(dir))