[Windows] Escaping doesn't work properly (also impacts zx --install)

[dmelikhov]

Expected Behavior

// script.mjs
#!/usr/bin/env zx
const x = "\\asd";
await $({ verbose: true })`echo ${x}`;

// expected output
$ ./script.mjs
> $ echo $'\\asd'
> \asd

Actual Behavior

// actual output
$ ./script.mjs
> $ echo $'\\asd'
> sd

// it's also playing Windows Terminal's beep/alert sound,
// so looks like \\a is treated as the \a escape sequence

I initially discovered this issue while trying to execute zx --install script.mjs -
NPM failed to install a package, because --prefix d:\\...\\a-dir-starting-with-a\\... was not escaped properly.

Specifications

• zx version: 8.1.4
• Platform: Windows 11 + Git Bash is in PATH
• Runtime: node v20.15.1