views::tail's documentation is incorrect

[szilardszaloki]

views::tail: "Given a source range, return a new range without the first element. The range must have at least one element." – https://ericniebler.github.io/range-v3/index.html#autotoc_md8

"The range must have at least one element." part doesn't seem to hold anymore as ranges::advance handles the empty range case inside views::tail's implementation.