bug#27614: 26.0.50; kill-region deletes the rest of the document when there is no region selected

[Jeffrey Brown]

If I highlight something and then run kill-region (C-w), it

gets killed. That's good.

But if I highlight nothing, and accidentally run kill-region, the

rest of the document starting at the cursor gets killed.

I know it sounds stupid, but more than once I have killed a lot of text

like that and not realized it until much later, thanks to Git.

Emacs is wonderful, thank you so much.