merge: only store one direction of copies in the copy map
simplify checkpair
generate copied hash from copy map
make copy cases more symmetrical
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init a
cd a
hg qnew first.patch
hg qnew first.patch
touch ../first.patch
hg qimport ../first.patch
exit 0