message: Update ABTEST_IN_PADDLE_SERVING.md
  fix doc error
diff: @@ -88,7 +88,7 @@ with open('processed.data') as f:
  cnt[tag]['total'] += 1
  for tag, data in cnt.items():
  - print('[{}](total: {}) acc: {}'.format(tag, data['total'], float(data['acc']) / float(data['total'])))
  + print('[{}]<total: {}> acc: {}'.format(tag, data['total'], float(data['acc']) / float(data['total'])))
  ```
  In the code, the function `client.add_variant(tag, clusters, variant_weight)` is to add a variant with label `tag` and flow weight `variant_weight`. In this example, a BOW variant with label of `bow` and flow weight of `10`, and an LSTM variant with label of `lstm` and a flow weight of `90` are added. The flow on the client side will be distributed to two variants according to the ratio of `10:90`.
  @@ -98,8 +98,8 @@ When making prediction on the client side, if the parameter `need_variant_tag=Tr
  ### Expected Results
  Due to different network conditions, the results of each prediction may be slightly different.
  ``` python
  -[lstm](total: 1867) acc: 0.490091055169
  -[bow](total: 217) acc: 0.73732718894
  +[lstm]<total: 1867> acc: 0.490091055169
  +[bow]<total: 217> acc: 0.73732718894
  ```
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