One of unit tests (tests.test_cli.TestMain.test_dataset_describe) is failing due to some encoding issue.

[sergey-serebryakov]

When running unit tests with pytest, one of unit tests (tests.test_cli.TestMain.test_dataset_describe) is failing for the forest_cover_type:default dataset with the following stack trace:

(It seems that this does not manifest itself when running this test directly, e.g., pytest tests/rest_cli.py).
The error occurred when the covtype.rst file is read, in particular, when reading this fragment - 30×30m (by character). Will be good to learn why this is happening. Meanwhile, running unit tests with the following command helps to avoid it:

python -X utf8 -m pytest

When this issue is resolved, update the Known Issues section.