From 207d3a56543b8fa59922df4988a2a2df282d69b3 Mon Sep 17 00:00:00 2001
From: TimFelix <35711942+TimFelixBeyer@users.noreply.github.com>
Date: Fri, 1 Mar 2024 00:39:27 +0100
Subject: [PATCH] fix lint

---
 music21/roman.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/music21/roman.py b/music21/roman.py
index 007aba86c..c810c98f9 100644
--- a/music21/roman.py
+++ b/music21/roman.py
@@ -3491,7 +3491,7 @@ def key(self, keyOrScale):
                 # multiple scales with the same name but different pitches.
                 scaleHash = keyOrScale.name
                 if getattr(keyOrScale, 'isConcrete', False):
-                    scaleHash += "_".join(
+                    scaleHash += '_'.join(
                         [p.nameWithOctave for p in keyOrScale.pitches]
                     )
                 if scaleHash in _scaleCache: