It stems back to a PR from the SerenityOS project where someone changed a “he” to a “they” in the documentation and the PR was declined for “personal politics”

Here’s an article about it: https://hyperborea.org/reviews/software/ladybird-inclusivity/

It does leave out this response by Kling on Twitter:

I’ve mostly been emulating lately. I’ve been playing Quest for Hat, which is an Earthbound rom hack, and Donkey Kong Country 2 since those have RetroAchievement’s achievement of the week and achievement of the month respectively.