Fix typo and run go fmt over fs_util

pkg/util/fs_util.go

@@ -121,8 +121,8 @@ func DeleteFilesystem() error {
 	logrus.Info("Deleting filesystem...")
 	return filepath.Walk(constants.RootDir, func(path string, info os.FileInfo, _ error) error {
 		if CheckWhitelist(path) {
-			if ! isExist(path) {
-				logrus.Debugf("Path  %s whitelisted, but not exists", path)
+			if !isExist(path) {
+				logrus.Debugf("Path %s whitelisted, but not exists", path)
 				return nil
 			}
 			if info.IsDir() {
@@ -141,7 +141,8 @@ func DeleteFilesystem() error {
 		return os.RemoveAll(path)
 	})
 }
-// isExists returns tru if path exists
+
+// isExists returns true if path exists
 func isExist(path string) bool {
 	if _, err := os.Stat(path); err == nil {
 		return true