revset: changed revsets to use spanset Performance Benchmarking: $ hg perfrevset "first(all())" ! wall 0.304936 comb 0.300000 user 0.280000 sys 0.020000 (best of 33) $ ./hg perfrevset "first(all())" ! wall 0.175640 comb 0.180000 user 0.160000 sys 0.020000 (best of 56)

revset: changed spanset to take a repo argument This way, we can have by default the length of the repo as the end argument and less code has to be aware of hidden revisions.