[Feature Request] Add mark-lines' like feature.

[zw963]

https://www.emacswiki.org/emacs/mark-lines.el

I don't know how you use what command to complete the same edit operation, please point out if you think this is not so necessary.

Following is my usage, i write a function, named mark-next-line, which use mark-lines-next-line which defined in mark-lines.el

(defun mark-next-line ()
  "Mark next line continuously."
  (interactive)
  (if (use-region-p)
      (next-line nil)
    (if (eql (point-max) (line-end-position))
        (mark-lines-next-line nil)
      (mark-lines-previous-line nil)
      )))

(global-set-key [(meta k)] 'mark-next-line)

Now i can pressing Alt+K several times, to mark several lines like following screenshot.

Then i can do operation, like save-to-ring, delete etc..

Thank you.