improve retrieved document parsing

app.py

@@ -122,6 +122,7 @@ def retriever(query: str, selected_retriever: str):
             # Add a blinking cursor to simulate typing
             placeholder.markdown(text + "▌")
         placeholder.markdown(text)
+        placeholder.markdown("\n")
 
         if retriever_endpoint == "None":
             return ""
@@ -147,7 +148,7 @@ def retriever(query: str, selected_retriever: str):
         retrieved_document_titles = ""
         for document in topk_documents:
             try:
-                idx = document.lower().index("abstract: ")
+                idx = document.lower().index("abstract:")
                 title = document[:idx].replace('\n', ' ')
                 retrieved_document_titles = retrieved_document_titles + title + '\n'
             except: