Refine yesterday's change to the degeneralization.
This avoids a small regression on the size of degeneralized automata of our usual list of literature formulae. * src/tgba/tgbatba.hh, src/tgba/tgbatba.cc (tgba_tba_proxy::union_acceptance_conditions_of_original_state): New method. * src/tgba/tgbatba.cc (tgba_tba_proxy_succ_iterator): In accepting states, ignore only the last expected acceptance condition if its common to all outgoing transitions AND if it is not used by any outgoing transitions of the destination.
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