20.77 dr3d:end-angle: some portions of the description have been turned into a note

In 20.77 dr3d:end-angle, replace the note Note: If it is the default (360deg), the 3D rotation object is closed and completely rotated. With values smaller than 360 it is possible to define opened 3D rotation objects (segments). The visible sides are closed and take into account the dr3d:back-scale and dr3d:edge-rounding attributes. With values larger than 360 it is possible to create 3D rotation objects with more than one rotation. This will only have a visible effect when the dr3d:back-scale attribute is used. with A value of 360 degrees defined that the 3D rotation object is closed and completely rotated. This is also the default. Values smaller than 360 degrees define opened 3D rotation objects (segments). The visible sides are closed and take into account the value of the dr3d:back-scale and dr3d:edge-rounding attributes. Values larger than 360 degrees define 3D rotation objects with more than one rotation. Note: Values larger than 360 degrees only have a visible effect when the dr3d:back-scale attribute is used.