The revision is concerned with Interface0DIterator and StrokeVertexIterator.
These iterators can be generated by Interface1D::vertices_end() and
Stroke::stroke_vertices_end(), respectively. These methods return an
iterator poinitng the next index of the last 0D element (i.e., iterator's is_end
property is true). When the iterators created in this way are used with
Python's iterator protocol (e.g., in a for-loop), iterations over 0D elements
are automatically performed in the reversed order. This functionality was
broken after recent revisions concerning Freestyle iterators.
Also made minor code cleanup (white space).
a16998911b