weiambt

Results 3 issues of weiambt

When i clicked the button "submit" in the "DataSet" section, it can not be imported successfully. Status ramain loading and won't stop. ![image](https://github.com/doccano/doccano/assets/62378914/4166b57b-c50e-433e-b808-0509cf4c6393)

The problem is in the file engines/data.py line 108. old: ``` tokens = [tokens for token in tokens if token if token not in [' ', '']] ``` modified: ```...

The original text was "price is 3 RMB/kg", but after the execution of the button "Export dataset", it became "price is 3 RMB\/kg" in specified json file. For details, the...