How to change https://developer-old.gnome.org/gtkmm-tutorial/stable/sec-i18n-marking-strings.html.en?

“Site Feedback for this site” interpreted as this = gnome.org.

The following site talks about translation and PO files.

https://developer-old.gnome.org/gtkmm-tutorial/stable/sec-i18n-marking-strings.html.en

How can I edit that site?

There’s a note at the bottom of the site:

It’s possible that certain strings will be marked as fuzzy in the .po file. These translations will not substitute the original string. To make them appear, simply remove the fuzzy tag.

Problem:
It talks about the fuzzy tag and that you should probably remove it, but it does not say why its there.

The source for that documentation is hosted here: https://gitlab.gnome.org/GNOME/gtkmm-documentation, specifically https://gitlab.gnome.org/GNOME/gtkmm-documentation/-/blob/master/docs/tutorial/C/index-in.docbook#L6660

So you should probably make a merge request against that or open an issue.