fix: demo images text excluded

api_server.py

@@ -88,7 +88,7 @@ def predict():
 
     # Check image shape
     if image_data.size != (28, 28):
-        return 'Invalid image shape. Expected (28, 28), take from <demo images> folder.'
+        return "Invalid image shape. Expected (28, 28), take from 'demo images' folder."
 
     # Preprocess the image
     processed_image = preprocess_image(image_data)