fix some of the demos + clarify some comments

Mesh/meshGFaceExtruded.cpp

-// $Id: meshGFaceExtruded.cpp,v 1.21 2007-07-31 22:09:11 geuzaine Exp $
+// $Id: meshGFaceExtruded.cpp,v 1.22 2007-08-02 16:16:19 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -193,7 +193,7 @@ int MeshExtrudedSurface(GFace *gf,
 
   Msg(STATUS2, "Meshing surface %d (extruded)", gf->tag());
 
-  // build a set with all the vertices on the boundary of gf
+  // build a set with all the vertices on the boundary of the face gf
   double old_tol = MVertexLessThanLexicographic::tolerance; 
   MVertexLessThanLexicographic::tolerance = 1.e-12 * CTX.lc;
 
@@ -209,8 +209,8 @@ int MeshExtrudedSurface(GFace *gf,
     ++it;
   }
 
-  // if the edges are constrained, the vertices already exist on the
-  // face--so we add them to the set
+  // if the edges of the mesh are constrained, the vertices already
+  // exist on the face--so we add them to the set
   if(constrainedEdges)
     pos.insert(gf->mesh_vertices.begin(), gf->mesh_vertices.end());
   

Mesh/meshGRegion.cpp

-// $Id: meshGRegion.cpp,v 1.31 2007-05-24 17:34:04 geuzaine Exp $
+// $Id: meshGRegion.cpp,v 1.32 2007-08-02 16:16:19 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -192,7 +192,7 @@ void MeshDelaunayVolume(std::vector<GRegion*> &regions)
 #else
 
   for(unsigned int i = 0; i < regions.size(); i++)
-    Msg(STATUS2, "Meshing volume %d (Delaunay)", regions[i]->tag());
+    Msg(STATUS2, "Meshing volume %d (Tetgen+Delaunay)", regions[i]->tag());
 
   // put all the faces in the same model
   GRegion *gr = regions[0];

benchmarks/3d/coil_crack/Piece1_4z1b.geo

@@ -227,8 +227,8 @@ Volume(vAir) = {news-2,news-1,surftotprobe};//Rest Air
 Characteristic Length{10,11,28,32}= pflaw ;//Watch out! Changing characteristic lenths of the flaw at the end
 //Characteristic Length{66,93}= ph3 ;
 
-//Transfinite Line{cd[0],cd[1],cd[2]} = 5 ;
-//Transfinite Line{15,6} = nDefect+1 ;
+Transfinite Line{cd[0],cd[1],cd[2]} = 5 ;
+Transfinite Line{15,6} = nDefect+1 ;
 
 //-------------------------------------------------------------------
 

benchmarks/3d/fil.geo

@@ -38,28 +38,28 @@ Line Loop(14) = {5,6,7,8,9,10,11,12};
 Plane Surface(15) = {13,14};
 
 Extrude Line {8, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {9, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {10, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {7, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {6, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {5, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {12, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 Extrude Line {11, {0,-1,0}, {0,0,0}, Pi/2}{
-  Layers {{R*Pi/2/mafil},{1},{1.0}};
+  Layers {{R*Pi/2/mafil},{1.0}};
 };
 
 Point(51) = {0,-wsubstrat/2,0,maboite};