Sorry; They are just gender-neutral pronouns, since I don't know the comment author's gender. I find it easiest to parse, when reading, as "she" and "her", in my head, because trying to use "he" and "him" gets me mixed up when I read "ner".

I know it's not the common pronouns, and I'm happy to use whatever "xe", "they", or [insert] anyone wants me to use, about them. But when I'm making the editorial decisions based on ignorance (don't know the person's pronouns and have no reasonable way to get them before publishing), I prefer the "ne" pronouns because they don't have the plural confusions* that "they" does, nor do they turn your mouth to mush when you try to pronounce them, like "ze"/"xe".

*(heading this off at the pass) yes, "they" is often used singularly. But where "they" can, in contrived instances, be confusing as to whether you mean a group or not, "ne" simply doesn't have that problem. "ne" removes one more complication and I'm all for that. I also prefer plain JS to typescript; I'm aware that "simplicity" is a vice of mine.