GitLab

* lisp/apropos.el (apropos--current): New variable akin to
help-xref-stack-item storing information for revert-buffer.
(apropos--revert-buffer): New function.
(apropos-mode): Use it as revert-buffer-function.
(apropos-command, apropos, apropos-library, apropos-value)
(apropos-local-value, apropos-documentation): Set apropos--current
in low-level commands, i.e., those which do not call other commands.