table.py

from cli_helpers.tabular_output import TabularOutputFormatter
formatter = TabularOutputFormatter(format_name='simple')
headers = ("Column A", "Column B")
so_much_b_data = "\n".join(str(i)*50 for i in range(10))
data = [ ("some a data", so_much_b_data) ]
format = "ascii"
print("\n".join(list(formatter.format_output(data, headers, format))))

When I run this, I see the following:

(note that the 9s are truncated, rather than showing all 50 of them)

https://cli-helpers.readthedocs.io/en/stable/api.html#cli_helpers.tabular_output.preprocessors.truncate_string says:

Truncate very long strings. Only needed for tabular representation, because trying to tabulate very long data is problematic in terms of performance, and does not make any sense visually.

This feels pretty weird to me... I think they might be right about long strings with no newlines, but long that aren't actually very wide but have a lot of newlines in them instead seem pretty reasonable to me...