Roll pyharp and tidy the card description

app.py

@@ -42,16 +42,14 @@ DEVICE = "cuda" if torch.cuda.is_available() else "cpu"
 model_card = ModelCard(
     name="StemFX",
     description=(
-        (
-            "Predicts a per-stem effects chain that makes one mix sound like a "
-            "reference mix, then applies it to the full track. The chain itself is "
-            "chosen by listening to only the first 10 seconds of each input (a limit "
-            "of the underlying model, trained on 10-second clips) and then applied "
-            "uniformly across the whole song -- it won't adapt if the song's "
-            "character changes partway through. Repository: "
-            "https://github.com/barry-mir/stemfx Paper: "
-            "https://arxiv.org/abs/2607.15634"
-        )
+        "Predicts a per-stem effects chain that makes one mix sound like a "
+        "reference mix, then applies it to the full track. The chain itself is "
+        "chosen by listening to only the first 10 seconds of each input (a "
+        "limit of the underlying model, trained on 10-second clips) and then "
+        "applied uniformly across the whole song -- it won't adapt if the "
+        "song's character changes partway through. Repository: "
+        "https://github.com/barry-mir/stemfx Paper: "
+        "https://arxiv.org/abs/2607.15634"
     ),
     author="Yuan-Chiao Cheng, Jui-Te Wu, Brian Chen, Yen-Tung Yeh, Yu-Hua Chen, Yi-Hsuan Yang",
     tags=[Subcategory.MIXING_STYLE_TRANSFER, 'style-transfer'],