Fix code formating & style to VTK coding-style rules.

IO/ParallelXML/vtkXMLPDataWriter.cxx

IO/ParallelXML/vtkXMLPImageDataWriter.cxx

IO/ParallelXML/vtkXMLPPolyDataWriter.cxx

IO/ParallelXML/vtkXMLPStructuredGridWriter.cxx

IO/ParallelXML/vtkXMLPUnstructuredDataWriter.cxx

IO/ParallelXML/vtkXMLPUnstructuredGridWriter.cxx

IO/XML/vtkXMLCompositeDataReader.cxx

IO/XML/vtkXMLCompositeDataWriter.cxx

IO/XML/vtkXMLDataReader.cxx

IO/XML/vtkXMLDataSetWriter.cxx

IO/XML/vtkXMLFileReadTester.cxx

IO/XML/vtkXMLHyperOctreeReader.cxx

IO/XML/vtkXMLHyperOctreeWriter.cxx

IO/XML/vtkXMLImageDataReader.cxx

IO/XML/vtkXMLImageDataWriter.cxx

IO/XML/vtkXMLPImageDataReader.cxx

IO/XML/vtkXMLPPolyDataReader.cxx

IO/XML/vtkXMLPStructuredGridReader.cxx

IO/XML/vtkXMLPUnstructuredDataReader.cxx

IO/XML/vtkXMLPUnstructuredGridReader.cxx