diff --git a/README.md b/README.md
index f7a5df06a0f23dff158757324571918633a4e954..f9901ccd6d729df25d086b8eb05087708fefa393 100644
--- a/README.md
+++ b/README.md
@@ -187,7 +187,7 @@ The current hyperlinks redirect to [Previous Parakeet](https://github.com/Paddle
       <td rowspan="2" >Aishell</td>
       <td >DeepSpeech2 RNN + Conv based Models</td>
       <td>
-      <a href = "./examples/aishell/s0">deepspeech2-aishell</a> 
+      <a href = "./examples/aishell/s0">deepspeech2-aishell</a>
       </td>
     </tr>
     <tr>
@@ -200,7 +200,7 @@ The current hyperlinks redirect to [Previous Parakeet](https://github.com/Paddle
       <td> Librispeech</td>
       <td>Transformer based Attention Models </td>
       <td>
-      <a href = "./examples/librispeech/s0">deepspeech2-librispeech</a> / <a href = "./examples/librispeech/s1">transformer.conformer.u2-librispeech</a>  / <a href = "./examples/librispeech/s2">transformer.conformer.u2-kaldi-librispeech</a> 
+      <a href = "./examples/librispeech/s0">deepspeech2-librispeech</a> / <a href = "./examples/librispeech/s1">transformer.conformer.u2-librispeech</a>  / <a href = "./examples/librispeech/s2">transformer.conformer.u2-kaldi-librispeech</a>
       </td>
       </td>
     </tr>
@@ -223,7 +223,7 @@ The current hyperlinks redirect to [Previous Parakeet](https://github.com/Paddle
       <td>TIMIT</td>
       <td>Unified Streaming & Non-streaming Two-pass</td>
       <td>
-    <a href = "./examples/timit/s1"> u2-timit</a> 
+    <a href = "./examples/timit/s1"> u2-timit</a>
       </td>
     </tr>
   </tbody>
@@ -351,4 +351,3 @@ howpublished = {\url{https://github.com/PaddlePaddle/PaddleSpeech}},
 year={2021}
 }
 ```
-
diff --git a/paddlespeech/s2t/exps/u2_st/model.py b/paddlespeech/s2t/exps/u2_st/model.py
index 20bb31f5399eeed86d50233cebbcbeaebbf8759f..52d3c3b7d1df9e3c3583525614dda8e5b10412a3 100644
--- a/paddlespeech/s2t/exps/u2_st/model.py
+++ b/paddlespeech/s2t/exps/u2_st/model.py
@@ -441,7 +441,7 @@ class U2STTester(U2STTrainer):
             "".join(chr(t) for t in text[:text_len])
             for text, text_len in zip(texts, texts_len)
         ]
-        
+
         hyps = self.model.decode(
             audio,
             audio_len,