 ;; rectangles have lines of varying lengths.
 ;; http://emacs.stackexchange.com/a/3661/115
 
+(defvar modi/extend-rectangle--added-whitespace-boundaries '()
+  "Alist to hold the (start . end) positions of the white space added
+to the last line of the rectangle by `modi/extend-rectangle--core'.")
+
 ;; Below is inspired from the `rectangle-utils' package.
 ;; https://github.com/thierryvolpiatto/rectangle-utils
 (defun modi/extend-rectangle--core (beg end)

         (line-info '())
         rect-left-col
         len)
    ;; (message "Before: beg=%0d end=%0d" beg end)
    ;; When the end point of the region is on the 0th column, `count-lines'
    ;; returns a one less number, so increment that value by 1 to compensate.

;; Time-stamp: <2016-02-29 04:56:13 kmodi>

;; Functions related to editing text in the buffer
;; Contents:
