fix syntax error on mac
fix syntax error on mac

Gangbiao/cvmfs,MicBrain/cvmfs,Gangbiao/cvmfs,djw8605/cvmfs,reneme/cvmfs,alhowaidi/cvmfsNDN,cvmfs/cvmfs,trshaffer/cvmfs,reneme/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,cvmfs/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,trshaffer/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,reneme/cvmfs,cvmfs/cvmfs,djw8605/cvmfs,DrDaveD/cvmfs,Gangbiao/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,MicBrain/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,alhowaidi/cvmfsNDN,DrDaveD/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,MicBrain/cvmfs,reneme/cvmfs,MicBrain/cvmfs,DrDaveD/cvmfs,trshaffer/cvmfs,Moliholy/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,MicBrain/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,Moliholy/cvmfs