Lint for inclusive ranges from 0 to len

[clarfonthey]

Something along the lines of 0..=vec.len() is probably a mistake and most likely should be 0..vec.len().

[nk9]

There's a similar lint we already have, needless_range_loop. That discourages use of this sort of range in a loop entirely. Might that be sufficient?

[clarfonthey]

FWIW, this was created back in the years when you still had to do by-index loops frequently to appease the borrow checker. While there's still some of that nowadays, this probably is okay to close.