Add optional parameter for changed/added/del/unknown files to commands.dodiff
This makes it possible to avoid a call into repo.changes if the details
of what has changed is already known
#!/bin/sh
mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "0 0"
hg verify
hg parents
hg status
hg undo
hg verify
hg parents
hg status