Replace delete by destroy in comments dealing with states.

* src/tgba/succiter.hh, src/tgba/tgba.hh,
src/tgba/tgbabddconcrete.hh, src/tgba/tgbaproduct.hh,
src/tgba/tgbaunion.hh, src/tgbaalgos/bfssteps.hh,
src/tgbaalgos/gtec/ce.cc, src/tgbaalgos/gtec/explscc.hh,
src/tgbaalgos/gtec/gtec.cc, src/tgbaalgos/replayrun.cc,
src/tgbaalgos/scc.cc, src/tgbaalgos/scc.hh: Update comments
to say that we "destroy" a state instead of "deleting" it.

src/tgbaalgos/bfssteps.hh

@@ -1,3 +1,5 @@
+// Copyright (C) 2011 Laboratoire de Recherche et Developpement de
+// l'Epita (LRDE).
 // Copyright (C) 2004, 2005  Laboratoire d'Informatique de Paris 6 (LIP6),
 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
 // et Marie Curie.
@@ -62,8 +64,8 @@ namespace spot
     ///
     /// If you already have a map or a set which uses states as keys,
     /// you should probably arrange for filter() to return these keys,
-    /// and delete \a s.  Otherwise you will have to define such a
-    /// set, just to be able to delete all the state* in a subclass.
+    /// and destroy \a s.  Otherwise you will have to define such a
+    /// set, just to be able to destroy all the state* in a subclass.
     ///
     /// This function can return 0 if the given state should not be
     /// explored.

src/tgbaalgos/gtec/ce.cc

@@ -235,7 +235,7 @@ namespace spot
   {
     ecs_->print_stats(os);
     // FIXME: This is bogusly assuming run_ exists.  (Even if we
-    // created it, the user might have delete it.)
+    // created it, the user might have deleted it.)
     os << run_->prefix.size() << " states in run_->prefix" << std::endl;
     os << run_->cycle.size() << " states in run_->cycle" << std::endl;
   }

src/tgbaalgos/gtec/explscc.hh

@@ -1,3 +1,5 @@
+// Copyright (C) 2011  Laboratoire de Recherche et Développement de
+// l'Epita (LRDE).
 // Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
 // et Marie Curie.
@@ -35,7 +37,7 @@ namespace spot
     virtual ~explicit_connected_component() {}
     /// \brief Check if the SCC contains states \a s.
     ///
-    /// Return the representative of \a s in the SCC, and delete \a
+    /// Return the representative of \a s in the SCC, and destroy \a
     /// s if it is different (acting like
     /// numbered_state_heap::filter), or 0 otherwise.
     virtual const state* has_state(const state* s) const = 0;

src/tgbaalgos/gtec/gtec.cc

@@ -216,7 +216,7 @@ namespace spot
 	      }
 
 	    delete succ;
-	    // Do not delete CURR: it is a key in H.
+	    // Do not destroy CURR: it is a key in H.
 	    continue;
 	  }
 
@@ -363,7 +363,7 @@ namespace spot
   void
   couvreur99_check_shy::clear_todo()
   {
-    // We must delete all states appearing in TODO
+    // We must destroy all states appearing in TODO
     // unless they are used as keys in H.
     while (!todo.empty())
       {
@@ -371,7 +371,7 @@ namespace spot
 	for (succ_queue::iterator q = queue.begin();
 	     q != queue.end(); ++q)
 	  {
-	    // Delete the state if it is a clone of a
+	    // Destroy the state if it is a clone of a
 	    // state in the heap...
 	    numbered_state_heap::state_index_p spi = ecs_->h->index(q->s);
 	    // ... or if it is an unknown state.

src/tgbaalgos/replayrun.cc

@@ -142,7 +142,7 @@ namespace spot
 	// browse the actual outgoing transitions
 	tgba_succ_iterator* j = a->succ_iter(s);
 	// When not debugging, S is not used as key in SEEN, so we can
-	// delete it right now.
+	// destroy it right now.
 	if (!debug)
 	  s->destroy();
 	for (j->first(); !j->done(); j->next())

src/tgbaalgos/scc.cc

@@ -198,7 +198,7 @@ namespace spot
 	      }
 
 	    delete succ;
-	    // Do not delete CURR: it is a key in H.
+	    // Do not destroy CURR: it is a key in H.
 	    continue;
 	  }
 

src/tgbaalgos/scc.hh

@@ -152,7 +152,7 @@ namespace spot
     /// \brief Return the set of states of an SCC.
     ///
     /// The states in the returned list are still owned by the scc_map
-    /// instance.  They should NOT be deleted by the client code.
+    /// instance.  They should NOT be destroyed by the client code.
     ///
     /// \pre This should only be called once build_map() has run.
     const std::list<const state*>& states_of(unsigned n) const;
@@ -160,7 +160,7 @@ namespace spot
     /// \brief Return one state of an SCC.
     ///
     /// The state in the returned list is still owned by the scc_map
-    /// instance.  It should NOT be deleted by the client code.
+    /// instance.  It should NOT be destroyed by the client code.
     ///
     /// \pre This should only be called once build_map() has run.
     const state* one_state_of(unsigned n) const;