export_to_file: wrong interpretation of with_column_names

[tpetrik]

Checklist

In order to speedup fixing the bug, please make sure you address as many items from the following checklist as possible.

• I have reproduced the issue with the latest released version of PyExasol.
• I have added references to issues that sound similar in section Related Issues.

Summary

According to documentation (https://exasol.github.io/pyexasol/master/user_guide/exploring_features/import_and_export/parameters.html) with_column_names can be True or False.
However, http_transport.py handles this differently: If the parameter is not None the option is set anyways!

[ArBridgeman]

@tpetrik Thanks for bringing this up. In this case, we should refine our documentation to be inline with the export command from Exasol: https://docs.exasol.com/db/latest/sql/export.htm, as this is treated as a flag, not a parameter taking boolean values.

You're right that how PyExasol has documented and implemented is not at this time clear nor consistent from a user perspective.