This generalizes the previous patch.
* src/ltltest/equalsf.cc: Allow escaped '\,' and
negated result.
* src/ltltest/Makefile.am: Use equalsf.cc for
almost all tests that used equals.cc.
(nequals): New.
* src/ltltest/equals.test, src/ltltest/eventuniv.test,
src/ltltest/lunabbrev.test, src/ltltest/nenoform.test,
src/ltltest/parseerr.test, src/ltltest/tunabbrev.test,
src/ltltest/tunenoform.test: Adjust.
Fortunately was only enabled with the
ltl_simplifier_options::favor_event_univ option, which cannot yet be
turned on from the command-line tools.
* src/ltlvisit/simplify.cc, doc/tl/tl.tex: Remove the rule.
* src/ltltest/eventuniv.test: Adjust.
* NEWS: Mention the bug.
The set of rules enabled by favor_even_univ try to "lift" the
subformulae that are both eventual and universal, so they appear
higher in the AST. This is contrary to what we used to do (and still
do when the option is unset), were we try to postpone such subformulae
(by moving them down the AST). It is still a bit experimental.
* src/ltlvisit/simplify.hh: Add option favor_event_univ.
* src/ltlvisit/simplify.cc: Implement new rewriting rules.
* doc/tl/tl.tex: Document them.
* src/tgbatest/ltl2tgba.cc: Add option -ra to enable them.
* src/tgbatest/spotlbtt.test: Test the translation with this option.
* src/ltltest/reduc.cc, src/ltltest/equals.cc: Add option
to enable the new rules.
* src/ltltest/eventuniv.test: New file to test them.
* src/ltltest/Makefile.am: Add it.
