Yes, true, sorry. I restarted Geany 2.0 and 1.38 with default configuration but with Hack font (bellow Pluma 1.26 and Geany 2.0 with Virtual Box, same "wrong" rendering):
---
So I also installed Pluma next to Geany 1.38... but it's strange, I have the right rendering between both:
So I upgrade Geany to 2.0, and the wrong rendering is here:
---
I'm not sure to understand all.