On Mon, 29 Jul 2019 at 14:18, L A Walsh <b...@tlinx.org> wrote: > > Is there a T/F var expansion that does:
[...] > > Sorry if this is already implemented in some form, I'm just > not remembering there being one. Your message is not a bug report. The list help-b...@gnu.org> exists to help with questions like this.