Re: t1enc.def

Hi Bob

> That code (which was indeed suggested to me by David)

sure ... you noticed the smiley?

> has been in use in 
> several "extension" font packages for musixtex for about 10 years.

yes it would have worked 10 years ago (because back then t1enc didn't 
contain this declaration -- it was in the kernel at that time). But 
conceptually it belongs into the enc file and in fact is actually needed 
if a env file is loaded in certain situation (see github/1709). So in 
July that got fixed and so yes, it shows now in the 2025/11 release

And it would have shown in earlier -dev releases this summer, but of 
course, that doesn't really help if a file from LaTeX is used with plain 
tex.


> I'm guessing that something like
> 
> \def\DeclareFontSubstitution#1#2#3#4{}

yes, if I understand correctly what this is code trying to do, then the 
above line would render the declaration harmless for this context.

cheers
frank