test-merge-tools: windows fixes
- /bin/cat does not exist, expect 'cat'
- non-interactive mode is not correctly detected in pysh, force it
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init a
cd a
echo 'base' > base
hg ci -Ambase -d '1 0'
hg qnew -mmqbase mqbase
hg qsave
hg qrestore 2