Bug: org-set-tags-command deletes inherited tags [9.3.7 (9.3.7-18-g093b47-elpaplus @ /home/ionasal/.emacs.d/elpa/org-plus-contrib-20200810/)]

[Allen Li]

Example Org file:

* Parent :foo:bar:baz:
** Child :foo:bar:spam:

Invoking org-set-tags-command with point on Child prepopulates the
minibuffer prompt with only the tags :spam:

This is because org-get-tags doesn't distinguish between inherited only
tags and inherited tags which are also explicitly set on a heading, so
org-set-tags-command treats :foo:bar: as inherited only rather than also
set locally on the heading.

This is undesirable because having tags set directly on a heading has
different semantics even if they are also inherited (e.g., the TAGS
special property, or when headings will be refiled to a different
location later).

Attached patch.

0001-org.el-Don-t-exclude-local-tags-that-are-also-inheri.patch
Description: Text Data

Emacs  : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22)
 of 2020-08-11
Package: Org mode version 9.3.7 (9.3.7-18-g093b47-elpaplus @ 
/home/ionasal/.emacs.d/elpa/org-plus-contrib-20200810/)