STYLE: add usage notes to more utilities and solvers

applications/utilities/mesh/generation/extrude/extrudeMesh/extrudeMesh.C

@@ -261,6 +261,11 @@ void changeFrontBackPatches
 
 int main(int argc, char *argv[])
 {
+    argList::addNote
+    (
+        "Extrude mesh from existing patch."
+    );
+
     #include "addRegionOption.H"
     #include "setRootCase.H"
     #include "createTimeExtruded.H"

applications/utilities/mesh/generation/extrude/extrudeToRegionMesh/extrudeToRegionMesh.C

@@ -1462,7 +1462,10 @@ void extrudeGeometricProperties
 
 int main(int argc, char *argv[])
 {
-    argList::addNote("Create region mesh by extruding a faceZone or faceSet");
+    argList::addNote
+    (
+        "Create region mesh by extruding a faceZone or faceSet"
+    );
 
     #include "addRegionOption.H"
     #include "addOverwriteOption.H"

applications/utilities/mesh/generation/extrude2DMesh/extrude2DMeshApp.C

@@ -28,8 +28,8 @@ Group
     grpMeshGenerationUtilities
 
 Description
-    Takes 2D mesh (all faces 2 points only, no front and back faces) and
-    creates a 3D mesh by extruding with specified thickness.
+    Create a 3D mesh by extruding a 2D mesh with specified thickness.
+    For the 2D mesh, all faces are 2 points only, no front and back faces.
 
 Note
     Not sure about the walking of the faces to create the front and back faces.
@@ -110,6 +110,11 @@ static const Enum<ExtrudeMode> ExtrudeModeNames
 
 int main(int argc, char *argv[])
 {
+    argList::addNote
+    (
+        "Create a 3D mesh from a 2D mesh by extruding with specified thickness"
+    );
+
     argList::addArgument("surfaceFormat");
 
     #include "addOverwriteOption.H"

applications/utilities/mesh/generation/foamyMesh/foamyHexMesh/foamyHexMesh.C

@@ -45,6 +45,10 @@ using namespace Foam;
 
 int main(int argc, char *argv[])
 {
+    argList::addNote
+    (
+        "Conformal Voronoi automatic mesh generator"
+    );
     argList::addBoolOption
     (
         "checkGeometry",

applications/utilities/mesh/generation/foamyMesh/foamyQuadMesh/foamyQuadMesh.C

@@ -53,6 +53,11 @@ using namespace Foam;
 
 int main(int argc, char *argv[])
 {
+    argList::addNote
+    (
+        "Conformal Voronoi 2D automatic mesh generator"
+    );
+
     argList::noParallel();
     argList::addOption("pointsFile", "filename");