F-strings display problem

[NowanPython]

Describe the bug
When simply writing f-strings some random chars appear at the end of the line.
If it can be quite hard trying to see the bug on the simulator it always appears on the calculator with "real" programs

To Reproduce
Steps to reproduce the behavior:

1. Open the code app with syntax highlighting enabled and create a script
2. Write f-strings and move them till the bug appears

Screenshots

Device (please complete the following information):

• n0110, linux sim, web sim
• Upsilon Version: up to 1.0.1-dev
• Upsilon commit: up to fd159fe

[NowanPython]

Looks like I didn't see it was the same as #247. Sorry.