config: clean up message about ignored untrusted config
The error message relied on Python's default formatting of arguments
to an Exception's constructor. Let's try to make it a little more
readable for users.
Differential Revision: https://phab.mercurial-scm.org/D9352
@echo off
powershell -NoProfile -ExecutionPolicy unrestricted -Command "& '%~dp0\editmergeps.ps1' %*"