Using `parent_toc` duplication issue

[grahamsedman]

When doing some testing this sphinx theme, I've noticed that parent_toc(current_page_name, outermost_link_item) }} is duplicating the TOC tree.

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When you use the built in toctree(collapse=True, maxdepth=-1) it gives the correct TOC tree without the duplication issue.

[zzzeek]

hi there -

the implementation for this modified parent_toc is here at https://github.com/sqlalchemyorg/zzzeeksphinx/blob/main/zzzeeksphinx/toc.py#L18 .

I'm not observing any duplication issue on the two sites that zzzeeksphinx is built for, for example https://docs.sqlalchemy.org/en/20/orm/mapping_api.html and https://docs.makotemplates.org/en/latest/usage.html#mako.template.Template . That is not to say you aren't seeing an issue, just to say that for the two sites for which I provide zzzeeksphinx support, the function such as it is seems to be working "fine" (if you see otherwise, let me know).

If you have patches to apply to parent_toc which resolve the issue you are seeing and which don't break the implementation for what sqlalchemy and mako are doing, feel free to send a PR and I will evaluate and merge if appropriate.