What does "man bites dog situation" mean? Looking at the Wikipedia explanation for the phrase in the context of journalism it supports my question about the tit

What does "man bites dog situation" mean? Looking at the Wikipedia explanation for the phrase in the context of journalism it supports my question about the title: Extreme and rare events are more likely to be reported. Obviously shipping "Rust code" is much less noteworthy than "shipping Rust" would be.