moon test --update does nothing when using the native backend

[tonyfettes]

Bug Report

Environment

OS

Operating System: macOS

MoonBit CLI Tools Version

moon 0.1.20241202 (28bfce6 2024-12-02) ~/Workspace/test/moonbit/test/.moon/bin/moon
moonc v0.1.20241202+6dccd5c47 ~/Workspace/test/moonbit/test/.moon/bin/moonc
moonrun 0.1.20241202 (28bfce6 2024-12-02) ~/Workspace/test/moonbit/test/.moon/bin/moonrun

Steps to Reproduce

$ moon new .
Created .
$ rm -rf src/lib
$ rm -rf src/main
$ cat > src/a_test.mbt << EOF
test {
}

test {
  inspect!([(1, b" \"", 0.3)], content=""
  )
}
EOF
$ cat > src/moon.pkg.json << EOF
{}
EOF
$ moon test --target=native -u
Auto updating expect tests and retesting ...

Total tests: 2, passed: 2, failed: 0.
$ cat src/a_test.mbt
test {
}

test {
  inspect!([(1, b" \"", 0.3)], content=""
  )
}

Expected Behavior

The content [(1, b"\x20\x22", 0.3)] should be correctly updated to the argument content.

Actual Behavior

Nothing happens

Checklist

• (Optional) My case is minimal enough to be reproducible.