tests/test-backwards-remove

Demand-load most modules in the commands and ui modules.
# HG changeset patch
# User Bryan O'Sullivan <[e-mail]>
# Node ID 059c6e42fc4221816e26a72bef8cf780891989ca
# Parent  d2994b5298fb20f87dc1d4747635b280db3c0526
Demand-load most modules in the commands and ui modules.

This improves response times for a number of simple commands, as the
Python interpreter doesn't end up loading modules that it never uses.

There's less benefit to demand-loading in other modules.

#!/bin/sh -x
hg init
echo This is file a1 > a
hg add a
hg commit -t "commit #0" -d "0 0" -u user
ls
echo This is file b1 > b
hg add b
hg commit -t "commit #1" -d "0 0" -u user
hg co 0
# B should disappear
ls