localrepo: use revsymbol() in lookup()
lookup() seems to be about looking up a revision based on a symbol
that may come from the user (via the wire protocol), so revsymbol() is
appropriate here.
Differential Revision: https://phab.mercurial-scm.org/D3055
@echo off
powershell -NoProfile -ExecutionPolicy unrestricted -Command "& '%~dp0\editmergeps.ps1' %*"