Addresses Dmitry's comments [1,2,3], save for the ones that aren't directly related to this series [4,5] and will be dealt with later. Also made `notmuch-show-tag-all's ONLY-OPEN arg non-optional. Otherwise it would cause issues when running non-interactively. Peace -- Pieter [1] id:"87fwe0jz0y.fsf@gmail.com" [2] id:"87aa48jynx.fsf@gmail.com" [3] id:"87obsojzga.fsf@gmail.com" [4] id:"87ipiwjz85.fsf@gmail.com" [5] id:"87d394jyvm.fsf@gmail.com"