What does the merge request do?
Closes #360 (closed)
We could rewrite the recursive implementation into an iterative one. But the structure of the code isn't really well-suited for this (e.g. no tail recursion) and this happens really rarely, plus a >1000 level SVG is a pain to work with anyway.
So I just added an error message (luckily, on Python, one can catch StackOverflows!) and a unit test.
Summary for release notes
The DXF14 export now shows a better error message in case of a very, very deeply nested SVG document.
Add unit tests (if applicable)
inkex/are well documented
Clean merge request history