fileset: fix generator vs list bug in fast path
$ hg debugfileset 'a or b'
would only return a or b but not both because the base file list was a
generator instead of a replayable sequence.
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"}