Found the following HTML validation problems:
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Coord1D.html:123:1 (Coord1D.Rd:71): Warning: <h5> anchor "Arguments" already defined
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Coord1D.html:303:1 (Coord1D.Rd:184): Warning: <h5> anchor "Arguments" already defined
Coord2D.html:128:1 (Coord2D.Rd:74): Warning: <h5> anchor "Usage" already defined
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Coord3D.html:130:1 (Coord3D.Rd:75): Warning: <h5> anchor "Usage" already defined
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Coord3D.html:434:1 (Coord3D.Rd:279): Warning: <h5> anchor "Usage" already defined
Coord3D.html:440:1 (Coord3D.Rd:283): Warning: <h5> anchor "Arguments" already defined
Line2D.html:102:1 (Line2D.Rd:59): Warning: <h5> anchor "Usage" already defined
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Line2D.html:139:1 (Line2D.Rd:82): Warning: <h5> anchor "Arguments" already defined
Plane3D.html:160:1 (Plane3D.Rd:86): Warning: missing </ul> before </div>
Plane3D.html:106:1 (Plane3D.Rd:56): Warning: <h5> anchor "Usage" already defined
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Point1D.html:98:1 (Point1D.Rd:51): Warning: <h5> anchor "Usage" already defined
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as_plane3d.html:96:1 (as_plane3d.Rd:44): Warning: missing </ul> before </div>