Answers file setting / CLI switch behavior inconsistent with docs

[sisp]

Describe the problem

The answers file setting / CLI switch behavior is inconsistent with what the docs suggest. The docs state that this setting is a path relative to the destination path, but the subdirectory in a path to the answers file is ignored by the rendering and only the file name is used.

Template

📁 src/
├── 📄 {{ _copier_conf.answers_file }}.jinja
└── 📄 copier.yml

copier.yml content:

_answers_file: subdir/.custom-answers.yml

To Reproduce

$ copier copy src/ dst
No git tags found in template; using HEAD as ref

Copying from template version 0.0.0.post1.dev0+a4f2b63
    create  .
    create  .custom-answers.yml

Logs

n/a

Expected behavior

To be decided. IIRC, changing not only the file name but also its location via the answers file setting / CLI switch used to work some time ago, but I think #927 made it impossible. Should it be possible to override the location of the answers file or just its name when generating a new project?

Screenshots/screencasts/logs

No response

Operating system

Linux

Operating system distribution and version

Ubuntu 20.04

Copier version

8.1.0

Python version

CPython 3.9

Installation method

pipx+pypi

Additional context

No response