Update app.py

app.py

@@ -37,13 +37,13 @@ FFMPEG = _which("ffmpeg")
 FFPROBE = _which("ffprobe")
 
 if not FFMPEG or not FFPROBE:
-    MISSING_MSG = (
-        "⚠️ FFmpeg not found. Add a 'packages.txt' with exactly:
-ffmpeg
-libsm6
-libxext6
-Then restart the Space."
-    )
+MISSING_MSG = (
+    "⚠️ FFmpeg not found. Add a 'packages.txt' with exactly:\n"
+    "ffmpeg\n"
+    "libsm6\n"
+    "libxext6\n"
+    "Then restart the Space."
+)
 else:
     MISSING_MSG = ""