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Currently this only reads universal branches.  The parser (and the
automaton code) do not support universal initial states.

* spot/parseaut/parseaut.yy: Read universal branches.  Deal with
the no-univ-branch/!univ-branch change in HOA 1.1.
* tests/python/alternating.py: Read the output of print_hoa.
* tests/core/parseaut.test: Adjust test output, and add more tests.

* spot/twaalgos/hoa.cc: Implement it.
* tests/python/alternating.py: Test it.

This only allows creating universal edges, and reading the associated
destinations.

* spot/twa/twagraph.hh (new_univ_edges, univ_dests, is_alternating): New
function.
* python/spot/impl.i: Add Python bindings.
* tests/python/alternating.py: New file.
* tests/Makefile.am: Add it.

* spot/graph/graph.hh: Use the sign bit of destination state X to
designate a universal edge.  Store the destinations of such an edge in a
separate array, at index ~X.
* spot/graph/ngraph.hh, tests/core/graph.cc, tests/core/graph.test,
tests/core/ngraph.cc: Adjust test case to the new interface.

This version has optimization for explicit twa, and also for weak and
terminal (depending on whether an accepting run is requested) automata.

* spot/twaalgos/couvreurnew.hh, spot/twaalgos/couvreurnew.cc,
  spot/twaalgos/Makefile.am: New files for the new algorithm.
* spot/twaalgos/emptiness.cc, tests/core/randtgba.cc:
  Register new algorithm.

Reported by Shufang Zhu.

* spot/tl/ltlf.cc, spot/tl/ltlf.hh: Fix the transltion
and update the comments.
* tests/core/ltlfilt.test: Adjust test cases.
* NEWS: Mention the fix.
* THANKS: Add Shufang Zhu.

Reported by Shufang Zhu.

* spot/tl/ltlf.cc, spot/tl/ltlf.hh: Fix the transltion
and update the comments.
* tests/core/ltlfilt.test: Adjust test cases.
* NEWS: Mention the fix.
* THANKS: Add Shufang Zhu.

Compilation of each header file alone, as a safety check, was removed
when introducing "#pragma once" because we did not have to check for
possible double inclusion.  However we still need to compile each
header to make sure they are self-contained.

* tests/sanity/includes.test: Compile each header.
* tests/run.in: Export various compiler and directory flags.
* spot/twaalgos/emptiness_stats.hh, spot/misc/mspool.hh,
spot/misc/fixpool.hh: Include <spot/misc/common.hh>.
* spot/misc/common.hh: Include <cassert>.
* NEWS: Mention the fixed headers.

Compilation of each header file alone, as a safety check, was removed
when introducing "#pragma once" because we did not have to check for
possible double inclusion.  However we still need to compile each
header to make sure they are self-contained.

* tests/sanity/includes.test: Compile each header.
* tests/run.in: Export various compiler and directory flags.
* spot/twaalgos/emptiness_stats.hh, spot/misc/mspool.hh,
spot/misc/fixpool.hh: Include <spot/misc/common.hh>.
* spot/misc/common.hh: Include <cassert>.
* NEWS: Mention the fixed headers.

* spot/parseaut/parseaut.yy: Add a diagnostic.
* tests/core/parseaut.test: Test it.
* NEWS: Document it.

* spot/parseaut/parseaut.yy: Add a diagnostic.
* tests/core/parseaut.test: Test it.
* NEWS: Document it.

* tests/run.in: Here.

* tests/sanity/style.test: Allow parenthesis after 'operator delete'.

* tests/core/randtgba.cc: do not time statistics.

... by calling valgrind less often.

* tests/core/reduc.test, tests/core/reducpsl.test: Call
valgrind only on 1 of the 12 calls to randltl, and
2 of the 7 calls to reduc.

* tests/core/readltl.cc: Process many formulas from a
file instead of one arg at a time.
* tests/core/parse.test, tests/core/parseerr.test, tests/core/utf8.test:
Adjust to supply a file as input.

* tests/core/tostring.test: Move all the input formulas into...
* tests/core/tostring.cc: ... the code, and do the loop there.

Fix #198.  Reported by Maximilien Colange.

* spot/twaalgos/strength.cc (is_terminal): Test that no accepting
transition lead to a rejecting SCC.
* tests/core/strength.test: Add test case.
* spot/twaalgos/strength.hh, spot/twa/twa.hh, doc/org/concepts.org:
Adjust documentation.
* NEWS: Mention the fix.

Fix #198.  Reported by Maximilien Colange.

* spot/twaalgos/strength.cc (is_terminal): Test that no accepting
transition lead to a rejecting SCC.
* tests/core/strength.test: Add test case.
* spot/twaalgos/strength.hh, spot/twa/twa.hh, doc/org/concepts.org:
Adjust documentation.
* NEWS: Mention the fix.

Because gal2c generates some C++ sources that do not match our coding
convention and should not be checked.

* tests/sanity/80columns.test, tests/sanity/style.test: Do not test
files in tests' work directories.

Fixes #195.

* tests/ltsmin/check.test: Extract the spins and gal checks
and move them to...
* tests/ltsmin/check2.test, tests/ltsmin/check3.test: ... these files.
* tests/Makefile.am: Adjust.

This fixes c9aabcdd.

* spot/ltsmin/ltsmin.cc: Update the extension after compiling
the model.  Do not duplicate the symbol lookups for DVE and gal2C.
Also, improve error reporting in case of missing symbol.
* tests/ltsmin/check.test: Remove stray character.

* spot/ltsmin/ltsmin.cc: Handle GAL models.
* tests/Makefile.am: Test the new feature.
* tests/ltsmin/check.test: Also check GAL.
* tests/ltsmin/beem-peterson.4.gal: A new GAL model for tests.
* tests/ltsmin/finite.gal: A new GAL model for tests.
* tests/ltsmin/finite3.test: A new test for GAL.

* spot/misc/bitvect.hh, tests/core/bitvect.cc,
tests/core/bitvect.test: here.

* spot/graph/ngraph.hh, spot/ltsmin/ltsmin.cc,
spot/misc/bitvect.hh, spot/misc/intvcomp.cc,
spot/misc/satsolver.cc, spot/priv/weight.cc,
spot/ta/taexplicit.cc, spot/taalgos/minimize.cc,
spot/taalgos/reachiter.cc, spot/tl/exclusive.cc,
spot/tl/formula.cc, spot/tl/formula.hh,
spot/tl/mark.cc, spot/tl/mutation.cc,
spot/tl/relabel.cc, spot/tl/remove_x.cc,
spot/tl/simplify.cc, spot/twa/acc.cc,
spot/twa/acc.hh, spot/twa/formula2bdd.cc,
spot/twa/taatgba.cc, spot/twa/taatgba.hh,
spot/twa/twa.hh, spot/twa/twagraph.cc,
spot/twaalgos/bfssteps.cc, spot/twaalgos/canonicalize.cc,
spot/twaalgos/compsusp.cc, spot/twaalgos/copy.cc,
spot/twaalgos/cycles.cc, spot/twaalgos/degen.cc,
spot/twaalgos/determinize.cc, spot/twaalgos/dtwasat.cc,
spot/twaalgos/emptiness.cc, spot/twaalgos/gv04.cc,
spot/twaalgos/hoa.cc, spot/twaalgos/ltl2taa.cc,
spot/twaalgos/ltl2tgba_fm.cc, spot/twaalgos/magic.cc,
spot/twaalgos/mask.hh, spot/twaalgos/minimize.cc,
spot/twaalgos/powerset.cc, spot/twaalgos/product.cc,
spot/twaalgos/randomgraph.cc, spot/twaalgos/reachiter.cc,
spot/twaalgos/relabel.cc, spot/twaalgos/remfin.cc,
spot/twaalgos/sccfilter.cc, spot/twaalgos/se05.cc,
spot/twaalgos/simulation.cc, spot/twaalgos/stutter.cc,
spot/twaalgos/tau03opt.cc, spot/twaalgos/totgba.cc,
spot/twaalgos/word.cc, tests/core/bitvect.cc: here.

* tests/core/ltl2tgba.test: Add new test-case,
reported by Tomáš Babiak.
* NEWS: Mention the bug fixed by previous patch.

* spot/twa/twa.hh, spot/twa/twa.cc (intersects, intersecting_run,
intersecting_word): New functions.
* NEWS: Mention them.
* doc/org/tut51.org, tests/python/bugdet.py: Use them.

Suggested by Juraj Major.

* spot/twaalgos/sccfilter.cc: Here.
* tests/python/sccfilter.py: New file.
* tests/Makefile.am: Add it.
* NEWS: Mention the news.

Reported by Juraj Major.

* spot/twa/twa.hh: check num_sets() in prop_state_acc() so we do not
have to set it in set_acceptance(), causing trouble if set_acceptance()
is called multiple times.
* tests/python/setacc.py: New test case.
* tests/Makefile.am: Add it.
* THANKS: Add Juraj.
* NEWS: Mention the bug.

* spot/twaalgos/remfin.cc: Do not add a sink states to deterministic
weak automata, and actually apply the "weak" Fin-removal to any weak
automaton.
* tests/core/explprod.test: Add a test case for the previous patch,
but that used to fail because of this bug.
* NEWS: Mention the bug.

* tests/python/ipnbdoctest.py: here.

* tests/Makefile.am: Run Python tests before other tests.
* tests/python/ipnbdoctest.py: Add some debug.

Fixes #189.

* bin/ltldo.cc: Here.
* tests/core/ltldo.test: Adjust and add test-case for %R.
* NEWS: Mention the change.

Jupyter 4.2 just landed in Debian unstable, so we have a few failures
because of all the renamings.

* tests/python/ipnbdoctest.py: Adjust imports for Jupyter 4.2.

Fixes #187.

* spot/tl/ltlf.cc, spot/tl/ltlf.hh: New files.
* spot/tl/Makefile.am: Add them.
* bin/ltlfilt.cc: Add a new option.
* bin/man/ltlfilt.x: Add bibliographic reference.
* tests/core/ltlfilt.test: Add more tests.
* tests/python/ltlf.py: New file.
* tests/Makefile.am: Add it.
* python/spot/impl.i: Python bindings.
* NEWS: Mention it.

This fixes the incorrect output of tgba_determinize() reported yesterday
by Reuben Rowe.

* spot/twaalgos/simulation.cc: Do not purge unreachable states when
recording implications.
* tests/python/bugdet.py: New test case.
* tests/Makefile.am: Add it.
* THANKS: Add Reuben.
* NEWS: Mention the bug.

Fixes #193, reported by Etienne Renault.

* spot/parsetl/parsetl.yy: Clone printed formulas.
* tests/core/parse.test: Add test case.
* NEWS: Mention the issue.

Related to #188.  This is a third fix that independently
makes `'utfilt --is-unambiguous -q smaller.hoa' instantaneous.

* spot/twaalgos/remfin.cc: Clean the received automaton if
necessary.
* bin/autfilt.cc: No need to call cleanup_acceptance_here() before
remove_fin() anymore.
* tests/core/remfin.test: Add an additional test.
* NEWS: Mention the change.

Avoid calling scc_info::determine_unknown_acceptance on the product, as
suggested in #188.

* spot/twaalgos/isunamb.cc (is_unambiguous): Rewrite.
* tests/core/unambig.test: Add the automaton from #188.
* NEWS: Mention the improved function.
* spot/twaalgos/mask.cc,
spot/twaalgos/mask.hh (mask_keep_accessible_states): New function.