Training logs display ansi escape sequences in tqdm output

[andreasjansson]

I haven't seen this on other models:

Training Epoch2:  33%|�[34m███▎      �[0m| 3/9 [00:22<00:44,  7.35s/it]
Training Epoch2:  44%|�[34m████▍     �[0m| 4/9 [00:34<00:45,  9.19s/it]
Training Epoch2:  44%|�[34m████▍     �[0m| 4/9 [00:34<00:46,  9.21s/it]
Training Epoch2:  44%|�[34m████▍     �[0m| 4/9 [00:34<00:46,  9.21s/it]