void createDiffArea(Composite parent, FormToolkit toolkit, int span) {
diffSection = createSection(parent, toolkit, span);
diffSection.setText(UIText.CommitEditorPage_SectionFilesEmpty);
Composite filesArea = createSectionClient(diffSection, toolkit);
diffViewer = new CommitFileDiffViewer(filesArea, getSite(), SWT.MULTI
| SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION
| toolkit.getBorderStyle());
diffViewer.getTable().setData(FormToolkit.KEY_DRAW_BORDER,
FormToolkit.TREE_BORDER);
GridDataFactory.fillDefaults().grab(true, true)