Inf(i)|Inf(j) -> Inf(k) and Fin(i)&Fin(j) -> Fin(k)
Implement those rules in simplify_acceptance_here(). * NEWS: Mention the change. * spot/twa/acc.cc, spot/twa/acc.hh (acc_cond::acc_code::used_once_sets): New method. * spot/twaalgos/cleanacc.cc, spot/twaalgos/cleanacc.hh: Implement the above rule. * tests/core/remfin.test: Adjust expected results. * tests/python/simplacc.py: New file. * tests/Makefile.am: Add it.
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