[BUG][PYTHON] Boolean parameter examples rendered as lowercase 'true'/'false' instead of capitalized 'True'/'False' in generated Python docs (v7.16.0)

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• 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?

Description

When generating a Python client with OpenAPI Generator v7.16.0 (Docker image: openapitools/openapi-generator-cli:v7.16.0), if a boolean query parameter has an explicit example: true or example: false in the OpenAPI spec, the generated Python documentation (e.g. docs/DefaultApi.md) renders the example as lowercase true or false instead of Python's capitalized True or False.

This results in invalid Python code in the generated documentation and breaks copy-paste for users. Removing the explicit example: field results in correct output (capitalized True/False).

Minimal OpenAPI Spec to Reproduce

Filename: test-boolean-lowercase-issue.yaml

openapi: 3.0.0
info:
  title: Minimal Example - Boolean Lowercase in Python Docs
  version: 1.0.0
  description: |
    This minimal spec reproduces the issue where OpenAPI Generator v7.16.0
    with custom templates generates Python documentation examples with lowercase
    boolean values (false/true) instead of Python's capitalized booleans (False/True)
    when an explicit example is provided in the spec.
servers:
  - url: https://api.example.com
paths:
  /items:
    get:
      summary: List items
      operationId: listItems
      parameters:
        - name: include_deleted
          in: query
          required: false
          schema:
            type: boolean
          description: Include deleted items in results
          example: false
        - name: active_only
          in: query
          required: false
          schema:
            type: boolean
          description: Show only active items
          example: true
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  count:
                    type: integer

Generation Command

docker run --rm \
  -v "$(pwd)/test-boolean-lowercase-issue.yaml:/local/test.yaml" \
  -v "$(pwd)/out:/out" \
  openapitools/openapi-generator-cli:v7.16.0 generate \
  -i /local/test.yaml \
  -g python \
  -o /out \
  --package-name test_client

Actual Generated Output (docs/DefaultApi.md)

include_deleted = false # bool | Include deleted items in results (optional)
active_only = true # bool | Show only active items (optional)

Expected Output

include_deleted = False # bool | Include deleted items in results (optional)
active_only = True # bool | Show only active items (optional)

Problem

• OpenAPI spec uses example: false / example: true (valid YAML boolean syntax)
• Generator outputs these literally as false/true in Python code examples
• Python requires capitalized False/True — the generated example code is not valid Python

Workaround

Remove explicit example: values from boolean parameters. Without explicit examples, the generator correctly uses Python's False/True in documentation examples:

parameters:
  - name: include_deleted
    in: query
    schema:
      type: boolean
    # No explicit example - generator will use correct Python booleans

Suggest a Fix

The generator should render Python boolean examples as True/False in all generated Python documentation and example code, regardless of whether an explicit YAML boolean is provided as an example in the spec.

This is a bug in OpenAPI Generator v7.16.0's default Python templates.

Reproduce the issue with test-boolean-lowercase-issue.yaml using the documented Docker generation command, then inspect the default Python templates responsible for docs/DefaultApi.md. Verify how explicit boolean examples are rendered and add coverage for both true and false; done means generated Python examples use True and False without affecting other values.