I realize this already got pushed, but to me this seems like a
reversion for the 95% of users who haven't customized
notmuch-archive-tags and just want to know that archiving means
removing the inbox tag.  Why is this less confusing?  Users who have
customized notmuch-archive-tags will probably know that the "default"
doesn't apply to them.

Quoth david@tethera.net on Jun 02 at 11:04 am:
> From: David Bremner <bremner@debian.org>
> 
> These functions refer to default values of variables, but it seems
> less confusing and less likely to get out of date to just allow the
> user to follow the help cross-reference links.
> ---
>  emacs/notmuch-show.el | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
> 
> another proposed change from our notmuch-pick discussions.
> 
> diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
> index 613e666..600e802 100644
> --- a/emacs/notmuch-show.el
> +++ b/emacs/notmuch-show.el
> @@ -1835,10 +1835,9 @@ search results instead."
>    "Archive each message in thread.
>  
>  Archive each message currently shown by applying the tag changes
> -in `notmuch-archive-tags' to each (remove the \"inbox\" tag by
> -default). If a prefix argument is given, the messages will be
> -\"unarchived\", i.e. the tag changes in `notmuch-archive-tags'
> -will be reversed.
> +in `notmuch-archive-tags' to each. If a prefix argument is given,
> +the messages will be \"unarchived\", i.e. the tag changes in
> +`notmuch-archive-tags' will be reversed.
>  
>  Note: This command is safe from any race condition of new messages
>  being delivered to the same thread. It does not archive the
> @@ -1865,10 +1864,9 @@ buffer."
>    "Archive the current message.
>  
>  Archive the current message by applying the tag changes in
> -`notmuch-archive-tags' to it (remove the \"inbox\" tag by
> -default). If a prefix argument is given, the message will be
> -\"unarchived\", i.e. the tag changes in `notmuch-archive-tags'
> -will be reversed."
> +`notmuch-archive-tags' to it. If a prefix argument is given, the
> +message will be \"unarchived\", i.e. the tag changes in
> +`notmuch-archive-tags' will be reversed."
>    (interactive "P")
>    (when notmuch-archive-tags
>      (apply 'notmuch-show-tag-message