[ytdl} fix dfe4f00c for legacy yt-dlp

test/test_ytdl.py

@@ -262,15 +262,21 @@ class Test_CommandlineArguments_YtDlp(Test_CommandlineArguments):
 
     def test_metadata_from_title(self):
         opts = self._(["--metadata-from-title", "%(artist)s - %(title)s"])
+
+        try:
+            legacy = (self.module.version.__version__ < "2023.01.01")
+        except AttributeError:
+            legacy = True
+
+        actions = [self.module.MetadataFromFieldPP.to_action(
+                   "title:%(artist)s - %(title)s")]
+        if not legacy:
+            actions = {"pre_process": actions}
+
         self.assertEqual(opts["postprocessors"][0], {
             "key"    : "MetadataParser",
             "when"   : "pre_process",
-            "actions": {
-                "pre_process": [
-                    self.module.MetadataFromFieldPP.to_action(
-                        "title:%(artist)s - %(title)s")
-                ],
-            },
+            "actions": actions,
         })