Re: Unicode 11.0 added a special Copyleft symbol

[Paul Eggert]

Siraphob (Ben) Phipathananunth wrote:
> aren't copyright notices legally required to have the © character present?

Under US law a proper copyright notice must say either "copyright", or "copr.", 
or "©". For example, "Copyright 2018 Free Software Foundation, Inc." For 
details, please see:

https://www.copyright.gov/circs/circ03.pdf

The Emacs sources contain many copyright notices that have "(C)" in them in 
addition to "copyright". The "(C)" is not required by any law, and the simplest 
change (if we were to make any change at all) would be to remove the instances 
of "(C)". We could also replace "Copyright" with "©" but that might run into 
encoding issues for some files.