CycleDetection.getMark: cleanup
CycleDetection.getMark: cleanup

Ignore-this: d86a9ec068a36d8470430c5b7dfba455

darcs-hash:20091112032807-e018d-2aed267124367b3e85c3f7e346de36ff141d3334.gz

nathankot/dbmigrations,jakubfijalkowski/dbmigrations,nick0x01/dbmigrations,anton-dessiatov/dbmigrations,creswick/dbmigrations