Fork of lines.love without drawings; useful starting point for further forks

some more manual tests related to drawings

In the process I notice an issue: we seem to be adding no-op undo records after every drawing operation.

Created by  Kartik K. Agaram  on June 14, 2022
GHZMRR333P3FZ5C3BQZQSNW3ZW6JOK5BABZ2FKDI5374FOE6WVDQC
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