util: call warnings.warn() with a sysstr in nouideprecwarn
This preserves nouideprecwarn wanting a bytes, which is consistent
with the rest of hg.
Differential Revision: https://phab.mercurial-scm.org/D2210
@echo off
powershell -NoProfile -ExecutionPolicy unrestricted -Command "& '%~dp0\editmergeps.ps1' %*"