I can’t find those in source, i kind of susspect those a formating for links generations in documentation. API documentation is frequently revamped so quite possibly those are links that failed to be generated because something changed and snippit wasn’t corrected
[something](something) is markdown for creating a web link: [link name](link address). Markdown is used here on Answerhub and possibly in documentation generation. Maybe the documentation generator can use source paths (cpp) as link destinations (Answerhub requires an http link address).
Another possible cause: some programmers (myself included) sometimes write markdown in places where it’s not supported without thinking.