[PATCH] coding-assistants: simplify attribution

[Jonathan Corbet]

As suggested by Christian, I have applied his patch to a branch and
simplified the changelog, see below.

I'm nervous about applying it still because I don't think it's my role
to set this sort of policy; I really want to feel that there is a
consensus behind it.  So there's some additional CCs here because I
would like to hear from some folks:

- This policy document originally came out of the TAB; is the TAB (on
  CC) OK with this change?

- At least one maintainer (on CC) have said that they currently strip
  Assisted-by tags out of patches before applying them, a practice that
  would seem to undermine the whole policy.  Would this change be
  sufficient to end that practice?

Thanks,

jon