* Use full paths when launching processes on Windows
Addresses issue #3763.
* Add news item
* Suppress stderr from "which"
* Replace xonsh.xoreutils.which with shutil.which
* Use existing resolved binary location
* Ensure PATHEXT mock is not overwritten
* Add tests for running excutables on windows
* Ensure we don't set overwrite command when binary_loc is none
* tweak tests
* Revert "Ensure PATHEXT mock is not overwritten"
This reverts commit ce5d6ac091.
* Use monkeypatch for chdir
Co-authored-by: Morten Lund <melund@gmail.com>