TemplateResponse fails when all arguments are kwargs and context is passed as None

[Yazan-Sharaya]

When calling Jijna2Templates.TemplateResponse with keyword arguments and passing context=None like:

templates = Jinja2Templates("./some/path")
context = {"data": load_data_from_db()} if some_condition else None
response = templates.TemplateResponse(name="file.html", request=request, context=context)

This call fails with the following error:
AttributeError: 'NoneType' object has no attribute 'get'

Which is caused by calling .get() on context on this line.

I think passing context as None is expected, and the type hint and default value for context in the function declaration kinda implies that.