env: `-S` / `--split-string` not work

[Juemuren]

Steps to reproduce

in cmd / powershell / pwsh:

> env -S "python --version"
env: 'python --version': No such file or directory

even in git-bash:

> coreutils env -S "python --version"
env: 'python --version': No such file or directory

Expected behavior

> env -vS "python --version"
split -S:  ‘python --version’
 into:    ‘python’
     &    ‘--version’
executing: python
   arg[0]= ‘python’
   arg[1]= ‘--version’

Actual behavior

> env -vS 'python --version'
executing: 'python --version'
   arg[0]= 'python --version'

Environment

OS: Windows 11 WIN32_NT 10.0.26200.9168
PowerShell: 5.1.26100.9168
Pwsh: 7.6.5
Git Bash: 5.3.15(1)-release (x86_64-pc-cygwin)
uutils/coreutils version: 2026.6.16
env version: 0.8.0

[Juemuren]

This issue was fixed in uutils/coreutils#12657, and it no longer appears.

A bit of unfortunate timing: the PR was merged on 2026-06-19, just after the previous microsoft/coreutils release (2026-06-16). Then microsoft/coreutils released a new version on 2026-09-03, and I happened to run into this bug tody (2026-09-06).

Always three days. Impeccable timing on my part.