Macs, of course 
The tilde must be the only coding related character that works better on a macbook 
Is that why you picked Lua? jk 
AltGr+Tilde followed by Space does not help. It produces ~¨ in the editor.
No other editor on my windows machine does that. Have you rolled your own keyboard input? There must be ready made solutions for this. Even in java But you had your reasons I’m sure.
There is another keyboard combination that doesn’t work properly: pressing + to zoom in the editor. I thought that was caused by my laptop layout, but maybe it’s the same reason as the tilde.
It’s not a super big deal of course. If it wasn’t for Lua using tilde for “not equal to” I wouldn’t have cared at all. (Sidenote: Why does Lua not use != like every other language? Easier to type and easier to read.)