bug#30527: 26.0.91; describe-face does not mention :package-version

[Basil L. Contovounesios]

Severity: wishlist

After evaluating the following:

  (defgroup my-group nil
    "Custom group.")

  (defcustom my-var nil
    "User option."
    :package-version '(my-group . "0.1"))

  (defface my-face '((t :inherit default))
    "Custom face."
    :package-version '(my-group . "0.1"))

C-h v my-var RET then reports, "This variable was introduced, or its
default value was changed, in version 0.1 of the my-group package."

M-x describe-face RET my-face RET, on the other hand, makes no such
comment.  Given that defface is documented as accepting the same
keywords as defcustom, I think it would be nice if describe-face were
consistent with describe-variable in this regard.

-- 
Basil

In GNU Emacs 26.0.91 (build 5, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll 
bars)
 of 2018-02-18 built on thunk
Repository revision: 36e729f06cddd2a02fba15516f43f4c1a53bab55
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description:     Debian GNU/Linux testing (buster)