Improve evil-change's handling of screen-lines

[justbur]

When the type is screen-line and multiple real lines are spanned, make evil-change behave like it does for the line type (e.g., by adding and indenting a new line after deletion).

Partially fixes #1407

[axelf4]

This seems to break cc on the last continuation visual line as leftmost-point will refer to the start of the logical line.

Also what is the purpose of the (> nlines 1) check? For handling the last buffer line the special case in evil-delete needs to be extended to screen-line (e.g. 2cc).

[justbur]

(Sorry for the delay)

This seems to break cc on the last continuation visual line as leftmost-point will refer to the start of the logical line.

I'm not sure what you mean by "break". I don't see any obvious problems. Maybe you could give an example?

Also what is the purpose of the (> nlines 1) check?

The idea was that if you are in the middle of a long line that is wrapped and you select a single visual line you don't want to introduce a line break after cc. You just want to delete the corresponding text and insert something new. Note that if you delete a whole logical line, the selection covers two newline characters so you get nlines equal to 2.

For handling the last buffer line the special case in evil-delete needs to be extended to screen-line (e.g. 2cc).

Thanks, added a fix