Bug: stated pytest-regtest commands don't run as expected

[fisher568]

In Section 10.1 'Regression testing', command 'pytest --regtest-generate' does not run, instead giving following error

ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --regtest-generate

This occurs after making sure that pytest-regtest (v2.3.7 I think) is installed correctly via pip

I found that running 'pytest --regtest-reset' as noted in pytest-regtest docs works, then running the test as normal works