Hi

this is a small patch for the 'Introduction to Emacs LISP programming'
guide to show how let works on system-wide variables.
Understanding this would have made my life easier the past +20 years ;-)
and an example is sometimes worth 100 lines of explanation (more so if you
are in a hurry and you do diagonal reading)

Best, /PA

-- 
Fragen sind nicht da um beantwortet zu werden,
Fragen sind da um gestellt zu werden
Georg Kreisler

Headaches with a Juju log:
unit-basic-16: 09:17:36 WARNING juju.worker.uniter.operation we should run
a leader-deposed hook here, but we can't yet