update search_interface function

app.py

@@ -31,7 +31,8 @@ def semantic_search(query, model, embeddings, nbrs):
 def search_interface(query):
     similar_sentences = semantic_search(query, model, embeddings, nbrs)
     sentences = [sentence for sentence, distance in similar_sentences]
-    return sentences
+    formatted_output = '\n\n'.join(sentences)  # Join sentences with double newlines for separation
+    return formatted_output
 
 pd.set_option('display.max_colwidth', None)