Update app.py

app.py

@@ -111,7 +111,7 @@ def get_source_doc(output):
     html_filename = source_document.metadata['source']
     source_doc_link = html_filename.replace('files/', '')
     source_doc_file = html_filename.replace('files/docs.arthur.ai/', '').replace('.html', '')
-        with open(source_doc_file, 'r') as f:
+    with open(source_doc_file, 'r') as f:
         source_text = f.read()
     return source_text, source_doc_link