fix some typos in the spot-x man page

* bin/spot-x.cc: Here.

bin/spot-x.cc

@@ -25,12 +25,12 @@
 #include "common_setup.hh"
 
 const char argp_program_doc[] ="\
-Common fine-tuning options for binaries built with Spot.\n\
+Common fine-tuning options for programs installed with Spot.\n\
 \n\
 The argument of -x or --extra-options is a comma-separated list of KEY=INT \
-assignments that are passed to the post-processing routines (they may \
+assignments that are passed to the post-processing or translation routines \
-be passed to other algorithms in the future). These options are \
+(they may be passed to other algorithms in the future).  These options are \
-mostly used for benchmarking and debugging purpose. KEYR (without any \
+mostly used for benchmarking and debugging purpose.  KEY (without any \
 value) is a shorthand for KEY=1, while !KEY is a shorthand for KEY=0.";
 
 #define DOC(NAME, TXT) NAME, 0, nullptr, OPTION_DOC | OPTION_NO_USAGE, TXT, 0
@@ -39,7 +39,7 @@ static const argp_option options[] =
   {
     { nullptr, 0, nullptr, 0, "Temporal logic simplification options:", 0 },
     { DOC("tls-impl",
-          "Control usage of implication-based rewriting. \
+          "Control usage of implication-based rewriting.  \
 (0) disables it, (1) enables rules based on syntactic implications, \
 (2) additionally allows automata-based implication checks, (3) enables \
 more rules based on automata-based implication checks.  The default value \
@@ -53,7 +53,8 @@ as product or sum of subformulas.") },
     { DOC("comp-susp", "Set to 1 to enable compositional suspension, \
 as described in our SPIN'13 paper (see Bibliography below).  Set to 2, \
 to build only the skeleton TGBA without composing it.  Set to 0 (the \
-default) to disable.") },
+default) to disable.  Nowadays, ltl-split already takes care of that for \
+suspendable subformulas at the top level.") },
     { DOC("early-susp", "When set to 1, start compositional suspension on \
 the transitions that enter accepting SCCs, and not only on the transitions \
 inside accepting SCCs.  This option defaults to 0, and is only used when \
@@ -63,33 +64,33 @@ explicitly iterate over all possible valuations of atomic propositions when \
 considering the successors of a BDD-encoded state, instead of discovering \
 possible successors by rewriting the BDD as a sum of product.  This is enabled \
 by default for --high, and disabled by default otherwise.  When unambiguous \
-automata are required, this option forced and cannot be disabled.") },
+automata are required, this option is forced and cannot be disabled.") },
     { DOC("skel-simul", "Default to 1.  Set to 0 to disable simulation \
-on the skeleton automaton during compositional suspension. Only used when \
+on the skeleton automaton during compositional suspension.  Only used when \
 comp-susp=1.") },
     { DOC("skel-wdba", "Set to 0 to disable WDBA \
-minimization on the skeleton automaton during compositional suspension. \
+minimization on the skeleton automaton during compositional suspension.  \
-Set to 1 always WDBA-minimize the skeleton .  Set to 2 to keep the WDBA \
+Set to 1 always WDBA-minimize the skeleton.  Set to 2 to keep the WDBA \
 only if it is smaller than the original skeleton.  This option is only \
 used when comp-susp=1 and default to 1 or 2 depending on whether --small \
 or --deterministic is specified.") },
     { nullptr, 0, nullptr, 0, "Postprocessing options:", 0 },
     { DOC("scc-filter", "Set to 1 (the default) to enable \
 SCC-pruning and acceptance simplification at the beginning of \
-post-processing. Transitions that are outside of accepting SCC are \
+post-processing.  Transitions that are outside of accepting SCC are \
 removed from accepting sets, except those that enter into an accepting \
-SCC. Set to 2 to remove even these entering transition from the \
+SCC.  Set to 2 to remove even these entering transition from the \
-accepting sets. Set to 0 to disable this SCC-pruning and acceptance \
+accepting sets.  Set to 0 to disable this SCC-pruning and acceptance \
 simpification pass.") },
     { DOC("degen-reset", "If non-zero (the default), the \
 degeneralization algorithm will reset its level any time it exits \
 an SCC.") },
     { DOC("degen-lcache", "If non-zero (the default is 1), whenever the \
 degeneralization algorithm enters an SCC on a state that has already \
-been associated to a level elsewhere, it should reuse that level. \
+been associated to a level elsewhere, it should reuse that level.  \
 Different values can be used to select which level to reuse: 1 always \
 uses the first level created, 2 uses the minimum level seen so far, and \
-3 uses the maximum level seen so far. The \"lcache\" stands for \
+3 uses the maximum level seen so far.  The \"lcache\" stands for \
 \"level cache\".") },
     { DOC("degen-order", "If non-zero, the degeneralization algorithm \
 will compute an independent degeneralization order for each SCC it \
@@ -149,9 +150,9 @@ This is enabled by default for medium and high optimization \
 levels.  Unless we are building deterministic automata, the \
 resulting automata are compared to the automata built using the \
 more traditional pipeline, and only kept if they are better.") },
-    { DOC("simul", "Set to 0 to disable simulation-based reductions. \
+    { DOC("simul", "Set to 0 to disable simulation-based reductions.  \
-Set to 1 to use only direct simulation. Set to 2 to use only reverse \
+Set to 1 to use only direct simulation.  Set to 2 to use only reverse \
-simulation. Set to 3 to iterate both direct and reverse simulations. \
+simulation.  Set to 3 to iterate both direct and reverse simulations. \
 The default is 3, except when option --low is specified, in which case \
 the default is 1.") },
     { DOC("ba-simul", "Set to 0 to disable simulation-based reductions \
@@ -189,8 +190,8 @@ that are weak and deterministic.  The default is 1 in --high mode, else 2 in \
     { DOC("wdba-det-max", "Maximum number of additional states allowed \
 in intermediate steps of WDBA-minimization. If the number of additional \
 states reached in the powerset construction or in the followup products \
-exceeds this value, WDBA-minimization is aborted. \
+exceeds this value, WDBA-minimization is aborted.  \
-Defaults to 4096. Set to 0 to disable. This limit is ignored when -D used \
+Defaults to 4096.  Set to 0 to disable.  This limit is ignored when -D used \
 or when det-max-states is set.") },
     { DOC("tba-det", "Set to 1 to attempt a powerset determinization \
 if the TGBA is not already deterministic.  Doing so will degeneralize \
@@ -203,15 +204,15 @@ is disabled at low level or if parameter \"simul\" is set to 0.") },
 of deterministic ω-automata.  If the input has n states, a SAT solver is \
 used to find an equivalent automaton with 1≤m<n states.  The value between \
 1 and 4 selects how the lowest possible m is searched, see the SAT-MINIMIZE \
-VALUE section.  SAT-based minimization uses PicoSAT (distributed with Spot), \
+VALUE section.  SAT-based minimization uses PicoSAT (embedded in Spot), \
 but another installed SAT-solver can be set thanks to the SPOT_SATSOLVER \
-environment variable. Enabling SAT-based minimization will also enable \
+environment variable.  Enabling SAT-based minimization will also enable \
 tba-det.") },
-    { DOC("sat-incr-steps", "Set the value of sat-incr-steps. This variable \
+    { DOC("sat-incr-steps", "Set the value of sat-incr-steps.  This variable \
-is used by two SAT-based minimization algorithms: (2) and (3). They are both \
+is used by two SAT-based minimization algorithms: (2) and (3).  They are both \
 described below.") },
     { DOC("sat-langmap", "Find the lower bound of default sat-minimize \
-procedure (1). This relies on the fact that the size of the minimal automaton \
+procedure (1).  This relies on the fact that the size of the minimal automaton \
 is at least equal to the total number of different languages recognized by \
 the automaton's states.") },
     { DOC("sat-states",
@@ -224,8 +225,8 @@ automaton could be constructed with the given number of states, the original \
 automaton is returned.") },
     { DOC("sat-acc",
           "When this is set to some positive integer, the SAT-based will \
-attempt to construct a TGBA with the given number of acceptance sets. \
+attempt to construct a TGBA with the given number of acceptance sets.  \
-states.  It may however return an automaton with fewer acceptance sets if \
+It may however return an automaton with fewer acceptance sets if \
 some of these are useless.  Setting sat-acc automatically \
 sets sat-minimize to 1 if not set differently.") },
     { DOC("state-based",