build a single compound shape before copy(), so that we won't duplicate internal boundaries - cf. #2000)

- new optional arguments to occ/addThruSections (#1976)

new tooltips in graphical window, to remove the fragile delay/timeout hacks used with built-in fltk tooltips

uninitalized value (see issue #1807)

See merge request !471

set read.step.nonmanifold to 1 like Salome; it doesn't seem to do much, but it probably cannot hurt :-)

extrude curve mesh depending on geo.Source (like for surfaces and volumes) instead of assuming that the extrusion is always done from the start point of the curve

create ghost cells in the usual way in PartitionUsingThisSplit() if they are not explicitly specified

OpenMP forbids leaving block via exception: catch exceptions inside the block, and throw the last error outside the block (cf. #1941)

use gmsh.view.option.*(tag, ...) instead of gmsh.option.*("View[index]...", ...) in tutorials (cf. #1649)