v1.0.8: correctness by design not accident 

v1.0.7: minor documentation improvement 

v1.0.6: minor documentation fix 

improved documentation 

v1.0.4: leverage grep more idiomatically 

v1.0.3: fix documentation bugs 

v1.0.2: fix documentation bugs 

v1.0.1: mention extundelete in documentation 

v1.0.0: initial implementation