Update app.py

app.py

@@ -54,7 +54,7 @@ async def answer_question(request: AnswerQuestionRequest):
         else:
             QA_input = {
                 'question': request.question,
-                'context': context_string.replace.('\n',' ')
+                'context': context_string.replace('\n',' ')
             }
             result = nlp(QA_input)
             ans = result['answer']