Bug 24442 ASTRewrite: Can't nest swaps
see TextBufferTest.testSwap2InSwap1
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/core/TextBufferTest.java
fEditor.add(SimpleTextEdit.createReplace(0, 3, "012"));
		fEditor.add(SimpleTextEdit.createInsert(2, "xx"));
		assertFalse(fEditor.canPerformEdits());
	}
	
	public void testOverlap7() throws Exception {
		MoveSourceEdit source= new MoveSourceEdit(2, 5);
		MoveTargetEdit target= new MoveTargetEdit(3, source);
		fEditor.add(source);
		fEditor.add(target);
		assertFalse(fEditor.canPerformEdits());
	}
	
	public void testOverlap8() throws Exception {
		MoveSourceEdit source= new MoveSourceEdit(2, 5);
		MoveTargetEdit target= new MoveTargetEdit(6, source);
		fEditor.add(source);
		fEditor.add(target);
		assertFalse(fEditor.canPerformEdits());
	}
	
	public void testOverlap9() throws Exception {
		MoveSourceEdit s1= new MoveSourceEdit(3, 1);
		MoveTargetEdit t1= new MoveTargetEdit(7, s1);
		MoveSourceEdit s2= new MoveSourceEdit(2, 3);
		MoveTargetEdit t2= new MoveTargetEdit(8, s2);
		fEditor.add(s1);
		fEditor.add(t1);
		fEditor.add(s2);