Bug 16181 Tab key doesn't work in editor when 'Insert spaces for tabs' enabled
Using integration build 0515, pressing Tab in an editor window doesn't do anything when 'Insert spaces for tabs' is selected. The editor is marked as unsaved, but no spaces appear.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
WorkspaceModifyOperation op= new WorkspaceModifyOperation() {
			public void execute(final IProgressMonitor monitor) throws CoreException {
				
				if (fragment != null && originalExists) {
						
					
					IWorkingCopyManager manager= JavaPlugin.getDefault().getWorkingCopyManager();
					ICompilationUnit unit= manager.getWorkingCopy(getEditorInput());
					
					/*
					 * 1GJXY0L: ITPJUI:WINNT - NPE during save As in Java editor
					 * Introduced null check, just go on in the null case
					 */
					if (unit != null) {
						/* 
						 * 1GF5YOX: ITPJUI:ALL - Save of delete file claims it's still there
						 * Changed false to true.
						 */
						unit.copy(fragment, null, fileName, true, monitor);
						return;
					}
						
				}
				
				
				
				
				/* 
				 * 1GF5YOX: ITPJUI:ALL - Save of delete file claims it's still there