TUT: basic, IO, preProcessing, VV: clean up tutorials

- TUT: mesh: add missing SnakeRiverCanyon files
- TUT: mesh: add missing cp source in a foamyHexMesh tutorial

tutorials/IO/systemCall/system/blockMeshDict

@@ -12,7 +12,6 @@ FoamFile
     class       dictionary;
     object      blockMeshDict;
 }
-
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 scale   1;
@@ -83,4 +82,5 @@ boundary
     }
 );
 
+
 // ************************************************************************* //