* README, doc/org/hoa.org: Here.

* NEWS, bin/autcross.cc, bin/autfilt.cc, bin/ltlcross.cc,
configure.ac, spot/parseaut/parseaut.yy, spot/twa/acc.cc,
spot/twa/acc.hh, tests/core/acc.cc, .gitlab-ci.yml: Here.

* spot/misc/bitset.hh: Here.
* spot/misc/bitset.cc: New file.
* spot/misc/Makefile.am: Add it.
* spot/twa/acc.hh: Conditionally remove the exception checks around
shift operators.
* spot/misc/common.hh (SPOT_ASSUME): New macro.

* spot/misc/common.hh (SPOT_BUILTIN_UNREACHABLE): Typo.

Fixes #348, reported by Jeroen Meijer.

* bin/autfilt.cc: If -B is used with many --product,
degeneralize intermediate products as needed.
* NEWS: Mention the change.
* tests/core/prodchain.test: New file.
* tests/Makefile.am: Add it.
* spot/twa/acc.cc, spot/twa/acc.hh: Fix reporting of
overflow.
* tests/core/acc.cc: Adjust.

Fixes #350.

* spot/twaalgos/product.cc: Implement this change.
* NEWS, spot/twaalgos/product.hh: Mention it.
* spot/twa/acc.cc, spot/twa/acc.hh (acc_cond::sat_mark): New method.
* tests/python/_product_weak.ipynb: New file.
* tests/Makefile.am: Add it.
* tests/python/automata.ipynb, tests/python/highlighting.ipynb,
tests/python/product.ipynb, tests/core/prodor.test: Adjust test cases.

* tests/core/ltlsynt.test: here

* tests/core/genltl.test: here
* spot/gen/formulas.cc: typo

* tests/core/ltlfilt.test: here

* bin/randltl.cc: here
* tests/core/rand.test: test it
* NEWS: document it

* bin/autcross.cc, bin/autfilt.cc, bin/ltlcross.cc,
  spot/parseaut/parseaut.yy: use SPOT_NB_ACC
* spot/twa/acc.hh: make implementation private

* spot/misc/bitset.hh: here
* tests/core/acc.cc: test it

This longstanding issue caused some emptiness checks options to be
ignored in the test suite, reducing coverage.

* spot/misc/optionmap.cc (set): Insert the other keys without
erasing the existing ones.

* spot/twaalgos/gtec/gtec.cc, spot/twaalgos/gtec/gtec.hh:
Here.

* bin/common_trans.cc, bin/common_trans.hh: Here.

* .gitlab-ci.yml: here

* spot/twa/acc.hh: here

* configure.ac: do not use bash-ism

* tests/core/acc.cc: here
* tests/core/acc.test: fix test invokation

* tests/core/ltlsynt.test: here

This allows to represent more than 32 acceptance marks.

* configure.ac: add an option to specify the number of marks
* spot/twa/acc.hh: implement it
* tests/python/acc_cond.ipynb, tests/core/acc.cc,
  tests/core/ltlcross3.test: update tests
* NEWS: document it
* bin/randltl.cc: fix an include

* spot/misc/bitset.hh: implement it
* spot/misc/Makefile.am: distribute it

* NEWS: document it
* spot/twaalgos/parity.cc, spot/twaalgos/parity.hh,
  tests/core/parity.cc: here

* tests/core/autcross.test, tests/core/autcross2.test: More tests.

* bin/ltl2tgta.cc: There is no -B option.

* bin/common_conv.cc, bin/common_conv.hh: Here.
* bin/autfilt.cc, bin/common_trans.cc, bin/ltlcross.cc, bin/ltldo.cc,
bin/ltlfilt.cc, bin/ltlgrind.cc, bin/randaut.cc, bin/randltl.cc: Pass
the name of the argumennt to the conversion function.
* tests/core/ltlcross3.test, tests/core/ltldo.test,
tests/core/randaut.test: Add test cases.

* bin/common_hoaread.hh (hoa_processor): Add a abort_on_error
option.
* bin/autcross.cc: Use it.
* tests/core/autcross4.test: Add many more error cases to improve
coverage.

* tests/core/genaut.test: Here.

Fixes #345.

* spot/parseaut/parseaut.yy: Deal with this inconvenient order.
* tests/core/parseaut.test: Test it.
* NEWS: Mention the bug fix.

Because it appears in some error messages we cannot remove.  Make
--usage as a synonym for --help.

* bin/common_setup.cc: Here.

* bin/common_trans.cc: Here.
* NEWS: Mention that.

* tests/core/scc.test: Here.

This also improve the coverage of the is_colored() function, because
it was not used in negative cases so far.

* bin/autfilt.cc: Implement it.
* tests/core/satmin2.test: Test it.
* NEWS: Mention it.

* tests/python/except.py: Here.

Fixes #349.

* bin/common_setup.cc (OPT_HELP, OPT_VERSION): Call close_stdout().

* bin/common_setup.cc: Here.

* lib/close-stream.c, lib/close-stream.h, lib/closeout.c,
lib/closeout.h, lib/fpending.c, lib/fpending.h, lib/stdio-impl.h,
lib/secure_getenv.c, m4/close-stream.m4, m4/closeout.m4,
m4/fpending.m4, m4/secure_getenv.m4: New file.
* lib/Makefile.am, m4/gnulib-cache.m4, m4/gnulib-comp.m4: Update.