Issue: LAST-N (Version 2)

[David A. Moon <Moon@STONY-BROOK.SCRC.Symbolics.COM>]

I support LAST-N:ALLOW-OPTIONAL-ARGUMENT on the basis that
  "This would make it more obvious why LAST should return a list and not
  an element. ie, it would return the "last N elements" where N=1 by default."

I certainly support releasing it to X3J13 and letting them decide what they
think of it.