wikipedia: not all fragments are sections

[dgw]

Description

MediaWiki uses document fragments for view state in some cases, such as when clicking an image thumbnail to open it in the full viewport. Sopel doesn't like this.

Reproduction steps

0. Ensure that wikipedia plugin is loaded
1. Send a link to e.g. https://en.wikipedia.org/wiki/Diffraction_spike#/media/File:Comparison_strut_diffraction_spikes.svg
2. Note error (Error fetching section "/media/File:Comparison_strut_diffraction_spikes.svg" for page "Diffraction spike".)

Expected behavior

Sopel should fetch either the article synopsis (fallback to ignoring fragment), or info about the media.

The third option is ignoring the link entirely, I suppose.

Relevant logs

No response

Notes

Inspired by #2315, which sort of mitigates a symptom of this (excess highlights) but doesn't treat the cause.

Sopel version

5c4f56e

Installation method

pip install

Python version

3.9.12

Operating system

No response

IRCd

No response

Relevant plugins

wikipedia

[dgw]

Came up again today.

"Easy fix" approach would be ignoring section IDs that begin with /.