log: reorganize if-else and for loop in logcmdutil._makematcher()
The test conditions are branchy depending on --follow and --rev options,
so it should be better to switch first by --follow --rev.
Note that revs is not empty so "if follow and startctxs" can be replaced
with "if follow and opts.get(b'rev')".
# __init__.py - Startup and module loading logic for Mercurial.
#
# Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
# Allow 'from mercurial import demandimport' to keep working.
import hgdemandimport
demandimport = hgdemandimport