History of 2016-09-19 C-x SPC (rectangle-mark-mode)

19:42 UTC Revision 1 . . . . Marcin BorkowskiIt’s old news, but I was reminded about it recently. While Emacs has had support for rectangle operations (press C-x r C-h and look for commands with “rectangle” in their name) since a very long time, it acquired rectangle-mark-mode rather recently (a few years ago, in v24.4).