STYLE: Add help to command-line arguments

applications/utilities/mesh/conversion/polyDualMesh/polyDualMeshApp.C

@@ -358,9 +358,22 @@ int main(int argc, char *argv[])
     timeSelector::addOptions(true, false);
 
     argList::validArgs.append("feature angle[0-180]");
-    argList::addBoolOption("splitAllFaces");
-    argList::addBoolOption("concaveMultiCells");
-    argList::addBoolOption("doNotPreserveFaceZones");
+    argList::addBoolOption
+    (
+        "splitAllFaces",
+        "have multiple faces inbetween cells"
+    );
+    argList::addBoolOption
+    (
+        "concaveMultiCells",
+        "split cells on concave boundary edges into multiple cells"
+    );
+    argList::addBoolOption
+    (
+        "doNotPreserveFaceZones",
+        "disable the default behaviour of preserving faceZones by having"
+        " multiple faces inbetween cells"
+    );
 
 #   include "setRootCase.H"
 #   include "createTime.H"