bug#79896: [coreutils] printf deficiencies

Hello,

today I noticed the following deficiencies in implementation and 
documentation of printf:

(1)
Built-in help (/usr/bin/printf --help)

     entirely fails to mention the option --.
     This is even more surprising, as an error message explicitly points 
to the built-in help when that option is used without any additional 
parameters:

$/usr/bin/printf --
printf: missing operand
Try '/usr/bin/printf --help' for more information.

(2)
man page  (commonly: /usr/share/man/man1/printf.1.gz)

     is missing any mention (lest description) of the option --.


(3)
Online-Documentation 
(https://www.gnu.org/software/coreutils/manual/html_node/printf-invocation.html#printf-invocation)

     is missing any mention (lest description) of the option --.

     Though at the end of that documentation page, it says:

         "The only options are a lone --help or --version. See Common 
options 
<https://www.gnu.org/software/coreutils/manual/html_node/Common-options.html>. 
Options must precede operands."

     Now seeing that only three "Common options" do exist, it does not 
seem to make sense that the printf page explicitly mentions only two of 
them  ( --help , --version  ) but not the third ( -- ).


Obviously, these deficiencies exist in all languages/translations.

Regards,
Bernhard