Update app.py

app.py

@@ -18,9 +18,9 @@ def preprocess_text(text: str) -> typing.List[typing.List[str]]:
         for sentence in sent_tokenizer.tokenize(text):
             words = word_tokenizer.tokenize(sentence)
             processed_words = fix_words(words)
-            processed_sentences.append(processed_words)
+            processed_sentences.append(" ".join(processed_words))
 
-        return  " ".join(processed_sentences)
+        return  processed_sentences
     
 def fix_words(words: typing.List[str]) -> typing.List[str]:
         fixed_words = []