Degree symbol in filename causing Klipper to crash when starting a print job

[daniel-gallagher]

I encountered a frustrating issue when trying to print 04_rollmount left_30°_v6_2020base_TI.STL where Klipper would crash with an SD card error message when attempting to print. I chased the issue for a while before I discovered it was the ° symbol in the filename that was causing Klipper to crash (Unicode character issue?). Once I replaced that symbol with deg, like most of the other file names, I was able to print successfully. There is also a space in the filename that should be replaced with an underscore _ to keep naming consistent and eliminate the need to escape the filename in Linux.

I believe all files that contain the ° symbol in the name should be changed to deg along with replacing the spaces with underscores _.

I can go into greater detail with my printer hardware and configuration and perform more thorough testing (once my printer is freed up) if needed, but wanted to document this asap in case someone else happened to be having the same issue.