code.sh parses argument incorrectly

[mrdrogdrog]

• VSCode Version: 1.8.1 - ee428b0
• OS Version: Arch Linux up to date

Steps to Reproduce:

1. Install Visual Studio Code via AUR
2. open terminal
3. input 'code a\ b\ c.txt' or 'code "a b c.txt"'
4. vscode opens and creates the tabs "a" "b" and "c.txt"

[mrdrogdrog]

See Pull Request #17853

[joaomoreno]

Fixed by #17853

[Tyriar]

Duplicates #17713 (already verified)