revset: added comments to all methods needed to duck-type from baseset
All this methods are required to duck-type for any class that works as a smart
set.
fixbundle() { grep -v 'saving bundle' | grep -v 'saved backup' | \ grep -v added | grep -v adding | \ grep -v "unable to find 'e' for patching" | \ grep -v "e: No such file or directory"}