Small fixes where the `get_svg` function is used, for example,
in the (obsolete) `DrawingView` class and `Arch_SectionPlane`.
Also update the unit tests accordingly.
+ fix memory leak (localDictionary) by replacing C API with PyCXX
+ don't write the whole code as error message if an error occurs. Python raises an exception with all relevant information for debugging
It takes a `Shape` and replicates it around a path, while at the
same time adding a rotation to each copy. This can be used to create
a twisted "ribcage" from a frame-like object, which can be used
in a more complicated `Shape`, for example, a tunnel or bridge
object.