Update app.py

app.py

@@ -20,7 +20,7 @@ def preprocess_text(text: str) -> typing.List[typing.List[str]]:
             processed_words = fix_words(words)
             processed_sentences.append(processed_words)
 
-        return processed_sentences
+        return  " ".join(processed_sentences)
     
 def fix_words(words: typing.List[str]) -> typing.List[str]:
         fixed_words = []