🚀 go-pugleaf

In GNU Emacs 19.25.1 of Mon Jun  6 1994 on eryops (i486-unknown-linux)
I believe it makes sense to be able to toggle the read-only property
of odd characters (for example, superscript numbers used to mark the
location of footnotes in a package I am developing).  I believe I have
tried all possible alternatives to switch off this property, but to no
avail.  It may be me, but ...

Do `emacs -q', and `insert-file' the following into the scratch buffer,
then evaluate each of the forms.  All but the first should complain 
about an Attempt to modify read-only text.  True enough, but suboptimal,
in my view.

========
a
(put-text-property 1 2 'read-only t)
(set-text-properties 1 2 '(read-only nil))
(set-text-properties 1 2 nil)
(remove-text-properties 1 2 '(read-only nil))
(put-text-property 1 2 'read-only nil)
========