backspace does not backspace on MacOS

[islonely]

Pressing backspace button on MacOS replaces the last character with invalid character instead of removing character. Here is what happens when running examples/demo/ and pressing backspace.

Before and after pressing backspace:

V Doctor:

V full version	V 0.4.9 4225a34.f9d3bd3
OS	macos, macOS, 15.2, 24C101
Processor	8 cpus, 64bit, little endian, Apple M3
Memory	2.1GB/16GB
V executable	/Users/adamoates/v/v
V last modified time	2025-01-19 21:19:31
V home dir	OK, value: /Users/adamoates/v
VMODULES	OK, value: /Users/adamoates/.vmodules
VTMP	OK, value: /tmp/v_501
Current working dir	OK, value: /Users/adamoates
Git version	git version 2.39.5 (Apple Git-154)
V git status	weekly.2025.03-5-gf9d3bd39
.git/config present	true
cc version	Apple clang version 16.0.0 (clang-1600.0.26.6)
gcc version	Apple clang version 16.0.0 (clang-1600.0.26.6)
clang version	Apple clang version 16.0.0 (clang-1600.0.26.6)
tcc version	tcc version 0.9.28rc 2024-02-05 HEAD@105d70f7 (AArch64 Darwin)
tcc git status	thirdparty-macos-arm64 713692d4
emcc version	N/A
glibc version	N/A