I would have said “feel free to submit a PR”
That was my thought.
From me elsewhere:
a change to code that would have some small positive benefit (for the people bothered by it) and no real negative other than, say, accepting a pr taking a few moments of time?
I honestly wouldn't have even read the original request as anything other than "Hey I'm bringing this up before I make these super simple changes and a pr, cool?"
Which, to me, is just open source friendly chat and a way to say "If you were going to make a change here I won't waste my time submitting on this" or "Maybe you'd want some more word options so I don't waste anyone's time". The reaction is way different than what makes sense to me.