Makefile.asm: Simplify variable expansions in generated headers

[jhb]

Summary

The :R:S expressions removed the .pl extension only to add it back
again, so just trim them to using :T alone.

[markj]

I'd consider defining a variable instead of repeating ${.ALLSRC:T}, or even keep the full message in a variable, so that future changes are easier.

so just trim them to using :T alone.

Extra "to"?

[jhb]

In D41588#948454, @markj wrote:

I'd consider defining a variable instead of repeating ${.ALLSRC:T}, or even keep the full message in a variable, so that future changes are easier.

Well, some cases use ${.IMPSRC:T} and others use ${.ALLSRC:T}. It may make sense to define a variable for the rest of the message, in particular to simplify Ed's request to use @generated in the comment.

so just trim them to using :T alone.

Extra "to"?

Hmm, I don't think so, but it is a bit wordy. "... again, just use :T alone." might be clearer.

[khorben]

To me this looks tidier and also more sensible than before; indeed, why did it set the suffix to .pl only to remove it and add it again?