* src/ltlast/multop.cc (instance): Here.
* src/ltlast/multop.hh, doc/tl/tl.tex: Adjust documentation.
* src/ltltest/equals.test: Adjust test cases.

* src/ltlast/bunop.cc (bunop::instance): Here.
* src/ltlast/bunop.hh, doc/tl/tl.tex: Document it.
* src/ltltest/equals.test: Test it.

* src/ltlast/bunop.hh, src/ltlast/bunop.cc, src/ltlvisit/randomltl.cc,
src/ltlvisit/simplify.cc, src/ltlvisit/tostring.cc,
src/tgbaalgos/ltl2tgba_fm.cc: Remove all traces of these two
operators since they are not handled like sugar.
* doc/tl/tl.tex: Adjust documentation to reflect the fact that these
two operators are sugar.

* src/ltlast/bunop.hh, src/ltlast/bunop.cc (sugar_goto, sugar_equal):
New functions..
* src/ltlparse/ltlparse.yy: Use them.

* src/ltlast/bunop.hh (is_bunop, is_Star): New functions.
* src/ltlast/multop.hh (is_And, is_Or): Fix constness.
(is_Concat, is_Fusion): New functions.
* src/ltlast/unop.hh (is_unop, is_X, is_F, is_G, is_GF, is_FG):
Fix constness.
(is_Not): New function.
* src/ltlvisit/tostring.cc (strip_star_not, match_goto,
emit_bunop_child, resugar_concat): New methods.
(visit(bunop)): Rewrite without calling format().  Detect the
[->i..j] pattern.
(visit(multop)): Call resugar_concat to detect [=i..j] patterns.

* src/ltlvisit/tostring.cc (to_string_visitor): Take a list of
keywords as fourth argument.
(to_spin_string_visitor): Remove.
(to_string, to_spin_string): Adjust usage of to_string_visitor.

* src/ltlast/formula.hh, src/ltlast/formula.cc (list_formula_props):
New function.
* wrap/python/spot.i: Adjust to wrap list_formula_props.
* wrap/python/ajax/ltl2tgba.html: Add option to display properties.
* wrap/python/ajax/spot.in: Handle ff=p and display properties.
* wrap/python/ajax/protocol.txt: Adjust.

* src/ltlvisit/tostring.cc (to_string_visitor): Here.

Because this means we are running dot twice, I have added a flag that
will allow us to easily turn this off, should it prove too slow.

* wrap/python/ajax/spot.in (output_both): New variable.
(run_dot): New function, extracted from ...
(render_dot): ... here.  Adjust to call run_dot for all needed format.
And ajust the output accordingly.

* src/ltlvisit/dotty.cc (dotty_visitor): Replace the "dir" attribute
by a childnum attribute used to number children.

* wrap/python/ajax/ltl2tgba.html: Revamp the syntax table to include
PSL operators.
* wrap/python/ajax/css/ltl2tgba.css: Adjust CSS as needed.

* src/ltlast/multop.hh (is_multop): Take a constant formula as input.
* src/ltlvisit/tostring.cc (to_string_visitor::visit(multop*)):
Output []=> or <>=> when the left argument of a []-> or <>-> is
a concatenation that ends in 1.
* doc/tl/tl.tex: Document this desugaring.

* src/ltlvisit/simplify.cc (spot::ltl::is_And, spot::ltl::is_F,
spot::ltl::is_FG, spot::ltl::is_G, spot::ltl::is_GF, spot::ltl::is_M,
spot::ltl::is_Or, spot::ltl::is_R, spot::ltl::is_U, spot::ltl::is_W,
spot::ltl::is_X, spot::ltl::is_binop, spot::ltl::is_constant,
spot::ltl::is_multop, spot::ltl::is_unop): Move ...
* src/ltlast/binop.hh, src/ltlast/constant.hh, src/ltlast/multop.hh
src/ltlast/unop.hh: ... here, as appropriate.

* src/ltlvisit/simplify.cc: Use but_all() to simplify code.

* src/ltlast/multop.hh, src/ltlast/multop.cc (all_but): New method
used to simplify the removal of one element of a multop.
* src/ltlvisit/simplify.cc: Implement the new rewriting rules.
* doc/tl/tl.tex: Document them.
* src/ltltest/reduccmp.test: Test them.

* src/ltlvisit/simplify.hh (ltl_simplifier_options): New option
reduce_size_stricly.
* src/ltlvisit/simplify.cc (simplify_visitor): Implement these
rules.
* src/ltltest/reduc.cc: Check with reduce_size_strictly unset or
set, but only use the latter result to check sizes.
* src/ltltest/reduccmp.test: Test them.
* doc/tl/tl.tex: Document them.

* doc/tl/tl.tex (Other Equivalences): Move...
(Defining LTL with only one of $\U$, $\W$, $\R$, or $\M$): ... here.

* src/ltlvisit/simplify.cc: Add new rules.
* doc/tl/tl.tex: Document them.
* src/ltltest/reduccmp.test: Add test cases.

* doc/tl/tl.tex (Syntactic Hierarchy Classes): Document the ->,
<->, and xor operators.  Also add a \phi_F class.

* src/ltlast/binop.cc (binop::binop): Fix computation
of syntactic guarantee and syntactic obligation for the Implies
operator.  Reported by Étienne Renault.
* src/ltltest/kind.test: Add more tests.

The actual rules are a bit more complex:
a & X(G(a&b...)&c...) = Ga & X(G(b...)&c...)
a | X(Fa | c) = F(a) | c
with the second rule being applied only if all XF can
be removed.  See the documentation for an example.

* src/ltlvisit/simplify.cc: Implement these new rules.
* doc/tl/tl.tex: Document them.
* src/ltltest/reduccmp.test: Add test cases.

* src/ltlvisit/simplify.cc: Implement these rules.
* src/ltltest/reduccmp.test: Add tests.
* doc/tl/tl.tex: Document them.

* src/ltlvisit/simplify.cc: Implement them here, and augment them
to support M, and W operators.
* src/ltltest/reduccmp.test: Add some tests.
* doc/tl/tl.tex (Simplifications Based on Implications): Document
these rules.
* doc/tl/tl.bib (babiak.12.tacas): New entry.

* src/ltlvisit/length.hh (length_boolone): New function.
* src/ltlvisit/length.cc (length_boolone): Implement it using...
(length_boolone_visitor): ... this new visitor.
* src/ltltest/randltl.cc: Use length_boolone() to check the result
of the random generator, and ignore any formula larger (in
length()) than opt_f.  This fix a bug where the random formula
generator would sometime produce formula larger than requested,
because of the trivial rewriting of {f}[]->e as e|!f.
* src/ltltest/length.cc: Add option -b to call length_boolone().
* src/ltltest/length.test: Test length_boolone().

* src/ltlvisit/simplify.cc (simplify_visitor): Implement these
rules.
* doc/tl/tl.tex: Document these rules.

* doc/tl/Makefile.am (LATEXMK): Set BIBINPUTS for VPATH builds.
(EXTRA_DIST): Distribute tl.tex and tl.bib.
($(srcdir)/tl.pdf): Fix update in srcdir.

* src/ltlvisit/simplify.cc (simplify_visitor::visit(multop)):
Initialize `ri' to kill a warning.

* src/ltlparse/ltlscan.ll: Parse "inf" as OP_UNBOUNDED.
* src/ltltest/equals.test: Add some tests.
* doc/tl/tl.tex: Document it.

* src/ltlvisit/dotty.cc (dotty_visitor::visit): Do not
declare bunop as sinks.

* src/ltlparse/ltlparse.yy: Cleanup the names used in the grammar.
* src/ltlparse/public.hh (parse_ratexp): Rename as...
(parse_sere): ... this.
* src/ltltest/consterm.cc: Adjust call to parse_ratexp().

* wrap/python/ajax/spot.in: Diagnose attempt to use LaCIM or Tau
on PSL formulae.
* wrap/python/ajax/css/ltl2tgba.css (.ltl2tgba .error): New entry.

* src/tgbatest/ltl2tgba.cc: Diagnose attempt to use -l and -taa
on PSL formulae.  Switch back to -f for these formulae.

* doc/tl/tl.tex: Replace all occurrences of ``rational
[expression]'' by SERE.  Add a couple of more notes and
bibliographic references.
* doc/tl/tl.bib: More entries.