mq: qpop: remove added files before re-adding removed files
We need to do this to avoid file/directories conflicts.
This causes patches removing a committed file and replacing it
with a directory to be "unpoppable".
#!/bin/sh
hg init test
cd test
echo foo > a
hg ci -Ama
hg up -r0000
echo bar > a
echo % should issue warning
hg ci -Amb
hg up -r0000
echo stuffy > a
echo % should not issue warning
hg ci -q -Amc
hg up -r0000
echo crap > a
hg branch testing
echo % should not issue warning
hg ci -q -Amd