Previous output was not very usable in presence of decomposed
specifications. We now keep track of the number of parts, and also
prefix the columns names with "max_" or "sum_" to indicate how their
statistics are updated in presence of multiple part. Other missing
statistics, like the size of the translated automaton, or maximal
number of colors seen in a game, have been added.
* spot/twaalgos/synthesis.hh (bench_var): Rename, augment, and
document each statistsic.
* spot/twaalgos/mealy_machine.cc, spot/twaalgos/synthesis.cc,
bin/ltlsynt.cc: Adjust to the new naming scheme.
* doc/org/ltlsynt.org: Show a CSV file, and document its columns.
* tests/core/ltlsynt-pgame.test, tests/core/ltlsynt2.test,
tests/core/ltlsynt.test: Adjust test cases.
* NEWS: Mention the backward incompatible change.