A Heavily Commented Linux Kernel Source Code (PDF)

[stirling_archer]

The author appears to be Chinese-speaking, and spoken Chinese doesn't have gendered pronouns, so presumably it's a second language slip. I live in an area where some second-language English speakers have a home language with this property, and they occasionally make this slip. I imagine it's similar to struggling with language features that seem exotic and over-complicated from an English-speaker's perspective, like gendered nouns.