... into copy_acceptance_of().  For #65.

* src/tgba/tgbagraph.hh, src/tgbaalgos/dupexp.cc,
src/tgbaalgos/emptiness.cc, src/tgbaalgos/mask.cc,
src/tgbaalgos/powerset.cc, src/tgbaalgos/sbacc.cc,
src/tgbaalgos/simulation.cc, src/tgbaalgos/stutter.cc: Here.