Ah, you're right, I totally missed that! But tbh that makes less sense to me. If this was pre-LLM then this is suggesting that humans were opening pull requests that change correctly-spelled words to incorrectly-spelled words? Is that some weird attempt at steganography?

Nope, just a large number of people who don't know English. As an example in context, someone might run a spell check and decide "incorrection" is an error, removing the humor.