Package:  emacs
Severity: wishlist

	Given that switch-to-buffer returns its argument, /and/ given
	that mapc returns the sequence it’s given, I suggest that the
	(mapcar 'switch-to-buffer LIST) forms in lisp/files.el be
	replaced with (mapc 'switch-to-buffer LIST), – if only to avoid
	the unnecessary consing when the list is effectively copied in
	the mapcar case.

	The lists mapcar is applied to in such cases are returned from
	find-file-noselect, and so, as it seems, are “fresh” ones
	anyway.

	A possible patch is MIMEd.

-- 
FSF associate member #7257  http://boycottsystemd.org/  … 3013 B6A0 230E 334A