modify some wording

Author: edisonxiang

pkg/volume/cinder/cinder_util.go

@@ -225,9 +225,9 @@ func probeAttachedVolume() error {
 
 	executor := exec.New()
 
-        // udevadm settle waits for udevd to process the device creation
-        // events for all hardware devices, thus ensuring that any device
-        // nodes have been created successfully before proceeding.
+	// udevadm settle waits for udevd to process the device creation
+	// events for all hardware devices, thus ensuring that any device
+	// nodes have been created successfully before proceeding.
 	argsSettle := []string{"settle", "--timeout=1"}
 	cmdSettle := executor.Command("udevadm", argsSettle...)
 	_, errSettle := cmdSettle.CombinedOutput()