clarify error log for number of allowed models in a Python file

[justbldwn]

resolves #6245

Description

simple fix to update the logging when less than or more than one python models are found in a given python file

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[gshank]

Could you merge main into your branch? I think the test error is something that was updated in main.

[justbldwn]

Could you merge main into your branch? I think the test error is something that was updated in main.

sure thing! just did now, i think it will require another approval for the CI to run. thanks for taking a look @gshank

[gshank]

There's a strange error in the CI jobs now; I'm looking into it.

[justbldwn]

There's a strange error in the CI jobs now; I'm looking into it.

thank you! let me know if there is anything else I can help you with on this, happy to do so.