Output includes an extra line

[yvt]

trafficstars

The output height is unexpectedly large as if it includes an extra blank line.

Expected:

Actual:

(Taken on https://ivanceras.github.io/svgbob-editor/ with border: 1px solid red added to the svg element)

[ivanceras]

The resulting svg is hardcoded to be padded with 1 character width/height on all 4 sides. This should probably be passed as margin in Settings.