Documentation: "Edit on GitHub" link broken

[dannyedel]

In the online documentation, the "Edit on GitHub" (top right corner) link appears to be broken.

Example link:

https://borgbackup.readthedocs.org/en/stable/installation.html refers to https://github.com/borgbackup/borg/blob/ec547402300e53728fb53bc20732049e63ef29c3/docs/installation.rst which is 404.

On my local clone, this is the sha of the gpg-signed tag object, not of the underlying commit, which is cd6044e.

The latest branch does not have this issue (it hardcodes "master" into the pathname).

Possible fix: If I use the tag's name instead of the sha, the link works as intended:

https://github.com/borgbackup/borg/blob/0.30.1/docs/installation.rst

If it's not possible to change the link target, then maybe disable the link on release builds, a 404 helps nobody to contribute.

[ThomasWaldmann]

The problem is known, but IIRC this is part of the readthedocs theme, not of our content/code.

Duplicate of #451 and #413. Issue is tracked there: readthedocs/readthedocs.org#1820