Update docs about automatic redirect when converting a multi-version project to single-version

Details

• Read the Docs project URL: https://readthedocs.org/projects/spinalcordtoolbox/
• Build URL (if applicable): https://readthedocs.org/projects/spinalcordtoolbox/builds/14723739/
• Read the Docs username (if applicable): joshuacwnewton

I recently enabled the “single version” setting on the spinalcordtoolbox project. As a result, the default URL for our project switched from https://spinalcordtoolbox.com/en/latest/ to https://spinalcordtoolbox.com/.

Expected Result

The RTD documentation for Single version states:

Documentation at /<language>/<default_version>/ will still be served for backwards compatibility reasons.

So, I expected all of the previous https://spinalcordtoolbox.com/en/latest/* links (our old default) to still be served.

Actual Result

All of the https://spinalcordtoolbox.com/en/latest/* links now lead to 404 pages.

[ericholscher]

Yea, I’d like to just remove that copy, and suggest a redirect. We don’t want to do this magically.

[stsewd]

I wasn’t even aware of that text, looks like it was added a long time ago https://github.com/readthedocs/readthedocs.org/blob/72037c0b7909d491389da68d7b7019d184901815/docs/single_version.rst

So, not sure if this was working before (we don’t track if a project has been converted from multiple versions to single-version), but yeah, we don’t try to serve those URLs currenlty (en/latest is taken as a file).

https://github.com/readthedocs/readthedocs.org/blob/135025f2a40ad7dfbaabda1261ee048a84e44a72/readthedocs/proxito/views/utils.py#L59-L67

So, we could keep the text and maybe create a redirect for the user or remove the text and suggest users to create a redirect by themselves. /cc @ericholscher