Import stuck when OBJ file does not have last empty line

[baiyanlali]

We found a bug that if I want to import a .obj file generated by trimesh, we can not import it in and when running unity, the game will stuck.

We think it's because the generated trimesh .obj file does not have the last empty line and the the reader stuck when read last line. But if we add a newline, the code can run well.

So if there is any possibility to fix the empty line bug?