bug#19829: 25.0.50; Design of commands operating on rectangular regions

[Richard Stallman]

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  > +(defvar region-insert-function
  > +  (lambda (lines)
  > +    (let ((first t))
  > +      (while lines
  > +        (or first
  > +            (insert ?\n))
  > +        (insert-for-yank (car lines))
  > +        (setq lines (cdr lines)
  > +              first nil))))
  > +  "Function to insert the region's content.
  > +Called with one argument LINES.
  > +Insert the region as a list of lines.")

What is the meaning of a list of lines as the region
if it is NOT a rectangle?  What would that kind of region mean,
and when would it be used?

(I ask because there's a different function for rectangles,
so this function won't be used with a list of lines for rectangles.)

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
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