Make review comments apply to a range of lines

[jdm]

I often provide review comments that apply to a number of contiguous lines. It would be much clearer if I could select them and show that the comment applies to all of them, like https://critic.hoppipolla.co.uk/showcomment?chain=8508 for example.

[pkaminski]

I considered this early on, but decided that the potential bump in clarity is not worth the extra UX complexity. For the rare cases where a line range is important it's possible to just describe it in the comment instead. At this point, the assumption that a discussion is attached to a single line is baked too deeply into the code, sorry.