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Fixes #287.

* bin/ltldo.cc: Implement it.
* tests/core/ltldo.test: Test it.
* NEWS: Mention the new feature.

* NEWS, configure.ac, doc/org/setup.org: Bump version.

* doc/org/oaut.org: Fix the call to convert.

* NEWS: typos

* NEWS: typos

Fixes #286.

* spot/twaalgos/simulation.cc: Only set the deterministic
property, not the non-deterministic one.
* tests/core/ltl2tgba.test: Add test case.
* NEWS: Mention the issue.

Fixes #285, reported by Florian Perlié-Long.

* NEWS: Mention the issue.
* spot/tl/formula.cc: Fix it.
* tests/core/kind.test: Document it.
* THANKS: Add Florian.

Fixes #284, reported by Juraj Major.

* spot/twaalgos/totgba.cc: Fix the algorithm.
* spot/twa/acc.hh: More doc for future generations.
* tests/core/scc.test: More test cases.
* NEWS: Mention the issues.

* tests/python/toweak.py: Here.

* spot/twaalgos/sccinfo.hh, spot/twaalgos/sccinfo.cc: Implement it
* tests/python/sccinfo.py: Test it
* NEWS: Document the fix

Fixes #282.

* spot/misc/bddlt.hh (bdd_less_than_stable): New function.
* spot/twa/twagraph.cc (merge_edges): Use it.
* tests/core/complement.test, tests/core/degenid.test,
tests/core/ltldo.test, tests/core/prodor.test,
tests/core/readsave.test, tests/core/sbacc.test,
tests/python/atva16-fig2a.ipynb, tests/python/automata.ipynb,
tests/python/decompose.ipynb, tests/python/dualize.py,
tests/python/highlighting.ipynb, tests/python/piperead.ipynb,
tests/python/product.ipynb, tests/python/simstate.py,
tests/python/tra2tba.py: Adjust all expected outputs.
* NEWS: Mention the bug.

* spot/twaalgos/postproc.cc: Here.

* spot/twaalgos/alternation.hh: Typos.
* spot/twa/twa.hh: Typos.

* bin/ltlfilt.cc: Remove SBAcc option as rabin_to_buchi_maybe() works
with transition-based acceptance as well.

These were the most expansive tests, each taking more than 5min.
This should bring them back below 1min.

* tests/core/parity.test: Do not run through valgrind.
* tests/python/toweak.py: Remove one very long case.

Suggested by Maximilien Colange.

* spot/twaalgos/degen.cc: If the output has more SCC than the input,
detect useless SCCs and remove them.
* spot/twaalgos/postproc.cc, spot/twaalgos/postproc.hh,
spot/twaalgos/degen.hh: Add support for a degen-remscc option.
* bin/spot-x.cc, NEWS: Document it.
* tests/core/degenscc.test: New file.
* tests/Makefile.am: Add it.
* tests/core/det.test: Lower some expected size (yay!).

Fixes #286.

* spot/twaalgos/simulation.cc: Only set the deterministic
property, not the non-deterministic one.
* tests/core/ltl2tgba.test: Add test case.
* NEWS: Mention the issue.

* spot/twaalgos/alternation.cc, spot/twaalgos/alternation.hh: Implement
remove_univ_otf.
* tests/python/alternating.py: Test it.
* python/spot/impl.i: Bindings.
* NEWS: Document it.

* tests/sanity/80columns.test: Check bin sources.
* bin/ltlsynt.cc: Fix it.

* bin/ltlsynt.cc: Use XARGMATCH for better error handling.

This also fixes some empty lines and unsorted options
that appeared in some tools.

* tests/sanity/bin.test: Ensure this is done.
* bin/README: Add a new paragraph about this.
* bin/autcross.cc, bin/ltlcross.cc: Move the
output options in their own section.
* bin/common_color.cc: Assume color options are
in group -15.
* bin/common_finput.cc, bin/common_finput.hh:
Add a headless variant.
* bin/genltl.cc, bin/ltlfilt.cc, bin/ltlgrind.cc,
bin/randaut.cc, bin/randltl.cc:  Do not force the
children groups, so that the options are correctly sorted.
* bin/ltlsynt.cc: Add missing groups.

Fixes #285, reported by Florian Perlié-Long.

* NEWS: Mention the issue.
* spot/tl/formula.cc: Fix it.
* tests/core/kind.test: Document it.
* THANKS: Add Florian.

Fixes #284, reported by Juraj Major.

* spot/twaalgos/totgba.cc: Fix the algorithm.
* spot/twa/acc.hh: More doc for future generations.
* tests/core/scc.test: More test cases.
* NEWS: Mention the issues.

* tests/python/toweak.py: Here.

* spot/twaalgos/sccinfo.hh, spot/twaalgos/sccinfo.cc: Implement it
* tests/python/sccinfo.py: Test it
* NEWS: Document the fix

* bin/ltlsynt.cc: Here.
* doc/org/ltlsynt.org: Document it.
* tests/core/ltlsynt.test: Test it.

* spot/misc/game.cc, spot/misc/game.hh: Here.
* bin/ltlsynt.cc: Realizability is now done by checking if the winning
strategy contains the initial state.

* spot/misc/game.cc, spot/misc/game.hh: Implement it.
* bin/ltlsynt.cc: Use it.
* doc/org/ltlsynt.org: Document it.

For now, ltlsynt only handles LTL realizability. It uses a reduction to
parity game followed by Calude et al.'s reduction from parity game to
reachability game.

* bin/ltlsynt.cc, bin/Makefile.am, bin/man/ltlsynt.x,
bin/man/Makefile.am, bin/.gitignore: New binary.
* doc/org/arch.tex, doc/Makefile.am, doc/org/tools.org,
doc/org/ltlsynt.org: Document it.
* spot/misc/game.cc, spot/misc/game.hh, spot/misc/Makefile.am: Parity
game wrapper for parity automata + reachability game interface from
Calude et al.'s paper.

parity_product_or constructs the sum of two parity automata and it keeps
the parity.

* spot/twaalgos/parity.cc, spot/twaalgos/parity.hh: Here.
* tests/core/parity.cc: Add tests here.

Some states can become identical once their history matrix are
cleaned. These states are merged and only store the cleaned matrix.

* spot/twaalgos/parity.cc: Here.

The history matrix of size n*m is replaced by couples of vectors with a
total size of n + m. These couples of vectors are simplified
representations of the history matrices, they ecnode the exact same
data. They are cached as well as the method to get the next history
matrix using the acc_sets and the current history matrix.

* spot/twaalgos/parity.cc: Here.

Compute the synchronized product of two parity automata, this product
keeps the parity acceptance.

* spot/twaalgos/parity.cc, spot/twaalgos/parity.hh: Here
* tests/core/parity.cc: Add tests for spot::parity_product()

Merge the acceptance sets of a parity acceptance with the same priority
level to simplify this acceptance.

* spot/twaalgos/parity.cc, spot/twaalgos/parity.hh: Here
* tests/core/parity.cc: Add tests for spot::cleanup_parity_acceptance()