moveToLineBoundary overshoot on wrapped lines

[jessegrosjean]

Describe the issue

Place cursor in the middle of a long wrapped paragraph. Press Cmd+Shift+Right. Observe that the selection sometimes includes the first character of the next visual (wrapped) line.

This doesn't happen for every line fragment, but it happens for many of them. Cursor movements Cmd+Right are similarly effected. Mouse clicking (click a little to trailing edge of line fragment) is also effected.

Browser and platform

Bug is Safari on Tahoe, Chrome on Tahoe does not have this error

Reproduction link

https://codemirror.net/try/#c=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

[marijnh]

Attached patch should help.

[jessegrosjean]

Fixed for me, and thank you.