How to modify logger method of model in fastai V2

fastai
1

Hi. There is an example of Tabular data on the GitHub page of fastai. The learner has a learner.logger() method which prints the results after each epoch.
How to overwrite the sep argument in logger method. By default sep=" ". I would like to change it to |.

Default:

epoch     train_loss  train_accuracy  valid_loss  valid_accuracy  time    
0         0.347873    0.839140        0.331298    0.875000        00:04

Preferred:

epoch  |   train_loss | train_accuracy | valid_loss | valid_accuracy | time    
0      |   0.347873   | 0.839140       | 0.331298   | 0.875000       | 00:04