better printing of error

app.py

@@ -73,7 +73,8 @@ def get_component_wise_memory(pipeline_id, token=None, variant=None, revision=No
                 variant_present_with_extension = any(condition(filename) for filename in current_component_filenames)
                 if not variant_present_with_extension:
                     raise ValueError(
-                        f"Requested extension ({extension}) and variant ({variant}) not present for {current_component}. Available files for this component:\n{current_component_filenames}."
+                        f"Requested extension ({extension}) and variant ({variant}) not present for {current_component}."
+                        f" Available files for this component:\n{'\n'.join(current_component_filenames)}."
                     )
             else:
                 raise ValueError(f"Problem with {current_component}.")