[mpiwg-coll] PR for scan/exscan clarification

Hello collective, Can I have an opinion on github.com<https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/11... > [X]<https://urldefense.us/v3/__https://github.com/mpi-forum/mpi-standard/pull/11... > which brings the syntax diagram of a few scan routines in line with other collectives, and improves on the accompanying text? Victor.