* claim: #10258
* Sketch: construction lines with a length (#10258)
The horizontal, vertical, angle, parallel and perpendicular construction
line commands take an optional `length`: the line becomes a construction
segment from `at`, running towards `near`, held by a length dimension
that follows its expression. Without `length` the line stays infinite,
as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Markus Kaltenbrunner <kaltenbrunnermarkus@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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