You mean comments in the middle of a line of code? I don't think I've ever done that (and I write a lot of C which would allow it). Seems like a readability nightmare to me, even with proper syntax highlighting.

I guess it could be useful if you want to temporarily debug the middle of a line for debugging purposes but in this case you could just add a line break if blockquote didn't exist.

That being said I don't feel very strongly about this topic, I let emacs handle the commenting for me so I never really have issues with nested comments. Besides commenting comments is probably only useful for temporary debugging.

I do feel strongly about people committing commented/dead code however, it's just distracting and misleading. Nowadays versioning your code is just one `git init` away so nobody should be worried about keeping old dead code "just in case".

Sample code is acceptable however, I like Rust's approach where commented sample code can actually be tested to make sure it's up to date.