Fix old school aliases

beetsplug/lastgenre/aliases.yaml

@@ -31,7 +31,9 @@ synth-pop:
 nu \1:
     - nu[ -]*(disco|jazz|metal|soul)
 
-# Old School spellings: old-skool-jungle/-hardcore, oldschool hip-hop
+# Old School spellings: old-school death metal, oldschool hip-hop, old-skool-jungle/-hardcore
+old school death metal:
+    - old[ -]*(?:school|skool)[ -]+death[ -]*metal
 old school hip hop:
     - old[ -]*(?:school|skool)[ -]+hip[ -]*hop
 old school \1:

beetsplug/lastgenre/genres-tree.yaml

@@ -676,6 +676,7 @@
             - death/doom
             - goregrind
             - melodic death metal
+            - old school death metal
             - technical death metal
         - doom metal:
             - epic doom metal

beetsplug/lastgenre/genres.txt

@@ -1095,9 +1095,10 @@ nyatiti
 néo kýma
 obscuro
 oi!
+old school death metal
+old school hardcore
 old school hip hop
 old school jungle
-old school hardcore
 old-time
 oldies
 olonkho

test/plugins/test_lastgenre.py

@@ -1094,6 +1094,9 @@ class TestAliases:
             ("psy rock", "psychedelic rock"),
             ("psych-pop", "psychedelic pop"),
             ("disney", "disney"),
+            ("old-school death-metal", "old school death metal"),
+            ("old-skool-hip-hop", "old school hip hop"),
+            ("old school-jungle", "old school jungle"),
         ],
     )
     def test_default_alias_patterns(self, config, input_genre, expected_genre):