Editing a file over scp fails on Windows

[saccarosium]

Problem

Attempting to edit a file using scp fails because the wrong path is provided for the local temp file.

Nvim tries to execute: scp -q "user@remote:/path/to/file" "/C/Users/User/AppData/Local/Temp/[...]"
which fails with "/C/Users/User/AppData/Local/Temp/[...]: No such file or directory
because "/C/Users[...]" is equivalent to "C:/C/Users[...]", and there is no C/ folder in the C: drive.

The path to the local file should be either "/Users/User/[...]" or "C:/Users/User/[...]"

Steps to reproduce

On Windows:

nvim --clean
:e scp://user@host//path/to/file

Expected behavior

Nvim tries to execute scp -q "user@remote:/path/to/file" "C:/Users/User/AppData/Local/Temp/[...]" and then proceeds as normal

Neovim version (nvim -v)

0.9.5, 0.10.0

Vim (not Nvim) behaves the same?

yes, 9.1

Operating system/version

Windows 11 23H2

Terminal name/version

cmd.exe, nvy.exe

$TERM environment variable

undefined

Installation

msi

original issue: neovim/neovim#29517