Update app.py

app.py

@@ -158,7 +158,7 @@ def image_to_wd14_tags(image: Image.Image, model_name: str, threshold: float,
         tag_outformat = tag
         if not use_spaces:
             tag_outformat = tag_outformat.replace('_', '-')
-        else
+        else:
             tag_outformat = tag_outformat.replace(' ', ', ')
             tag_outformat = tag_outformat.replace('_', ' ')
         if use_escape: