Before reading the article I thought they might be adding static code analysis to Stack Overflow answer snippets, and briefly wondered if that would be a nice feature to have. Wouldn’t it be great if you could see some common errors in code before trying it, “e.g. this code doesn’t check an error that it should, this code exhibits undefined behavior along all paths, etc.”?
Coincidentally, there is an open discussion about using Prettier to format the snippets: