Update: Atomic cross-rename of two paths (mv --exchange, exch)

I did not notice that the cross rename already existed when I was writing about it but it’s been there since coreutils v9.5 released in Mar 2024. $ mv --exchange file1 file2 And it also landed in util-linux v2.40 at about the same time as utility exch (added in commit cd094a05880c ): $ exch file1 file2 The two projects have an overlap in what they provide so the journey of mv --exchange took a few…