[BUG] [python] [python-pydantic-v1] generator template malformats markdown in description sections

[jmartens]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating documentation for the Topdesk incident API the parameter sections of the documentation is mangled up, output for incidents_id_id_archive_put is like this:

| Permission | Remark | |---------|-----------| | Operator | With 1st line incident write permission and write permission for archiving incidents; Category/Branch/Operator filters apply | | Person | No access | **NOTE**: * _PATCH_ operation can be used as well * If the incident has partial incidents they will also archived.

where it should be:

| Permission | Remark |
|---------|-----------|
| Operator | With 1st line incident write permission and write permission for unarchiving incidents; Category/Branch/Operator filters apply |
| Person | No access |
**NOTE**:
* _PATCH_ operation can be used as well

to render properly.

openapi-generator version

7.10.0

OpenAPI declaration file content or url

https://developers.topdesk.com/swagger/incident_specification_3.8.5.yaml

Generation Details

openapi-generator-cli generate -i https://developers.topdesk.com/swagger/incident_specification_3.8.5.yaml -g python

Steps to reproduce

openapi-generator-cli generate -i https://developers.topdesk.com/swagger/incident_specification_3.8.5.yaml -g python

Related issues/PRs

Suggest a fix

I think the templates miss a newline

[jmartens]

• Have you tested with the latest master to confirm the issue still exists?

Tested with latest snapshot jar (openapi-generator-cli-7.11.0-20250114.142750-100.jar) to confirm that issue is still present.

[jmartens]

• Have you validated the input using an OpenAPI validator (example)?

No see #20465

[jmartens]

• Have you tested with the latest master to confirm the issue still exists?

Tested with latest snapshot jar (openapi-generator-cli-7.11.0-20250114.142750-100.jar) to confirm that issue is still present.

python-pydantic-v1 also seems to suffer the same, also against above jar.

[jmartens]

where it should be:

| Permission | Remark |
|---------|-----------|
| Operator | With 1st line incident write permission and write permission for unarchiving incidents; Category/Branch/Operator filters apply |
| Person | No access |
**NOTE**:
* _PATCH_ operation can be used as well

to render properly.

The original contents from the yaml source file (line 3568-3574) has newlines:

      description: |
        | Permission | Remark |
        |---------|-----------|
        | Operator | With 1st line incident write permission and write permission for unarchiving incidents; Category/Branch/Operator filters apply |
        | Person | No access |
        **NOTE**:
        * _PATCH_ operation can be used as well