Closes #4505

Selecting two full lines including line ends makes a selection from
line 1 to line 3 (ch: 0). This command used to sort three lines (1 to
3) which is not what I expect. This change makes it sort only two
lines if there are no selected characters on the last line.

It also fixes a fatal error if there are more than one selection on
the same line (the code used 'range' instead of 'ranges').

It also selects the trailing newline after sorting the lines so that
the whole lines are selected.

Issue #4494

Issue #4492

See https://discuss.codemirror.net/t/npm-install-failing-for-cm-git-dependency/1088

Since showing it next to an empty chunk looks bad

Issue #4492

Issue #4485

Issue #4485

Closes #4484

Closes #4478

Issue #4476

Closes #4468

Closes #4473

Closes #4466

See: https://drafts.csswg.org/css-grid/#grid-shorthand

Closes #4462

This variable was unused after 0e545326.

Closes #3909

(For 'export default' syntax)

Issue #4452

Closes #4451

Closes #4452

when forced after compositionend event.

Issue #4441