Bug 15726 moves field comments from one field to another [quick fix]
20020508 public class A { int field; //field comment A(int fred){ _fred= fred; } } you are offered to create field _fred but then it steals the comment: int field; private int _fred; //field comment
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/astrewrite/ASTRewritingStatementsTest.java
Assignment newExpression= ast.newAssignment();
			newExpression.setLeftHandSide(ast.newSimpleName("x"));
			newExpression.setRightHandSide(ast.newNumberLiteral("1"));
			newExpression.setOperator(Assignment.Operator.ASSIGN);
			
			Statement newStatement= ast.newExpressionStatement(newExpression);
			
			rewrite.markAsReplaced(labeledStatement.getBody(), newStatement);
		}		
				
		ASTRewriteCorrectionProposal proposal= new ASTRewriteCorrectionProposal("", cu, rewrite, 10, null);
		proposal.getCompilationUnitChange().setSave(true);
		
		proposal.apply(null);
		
		buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("public class E {\n");
		buf.append("    public void foo() {\n");
		buf.append("        newLabel: x = 1;\n");
		buf.append("    }\n");
		buf.append("}\n");	
		assertEqualString(cu.getSource(), buf.toString());
		clearRewrite(rewrite);
	}		
	
	public void testReturnStatement() throws Exception {
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");