simplify make_filename, fix hg cat bug
hg cat was using file-level rev/node ids for generating filename
templates. This simplifies make_filename to only use changeset
rev/node ids.
# repo.py - repository base classes for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
class RepoError(Exception): pass