add -f/--force to remove command.
else to remove modified file, must use "hg revert; hg rm"
or "rm; hg rm --after".
# 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