The indentation algorithm for method="xml" has been changed so no extra whitespace is output if there is already enough whitespace in the result tree: specifically, if a start tag is preceded by a newline and as many spaces as the indentation would output, then no extra indentation takes place. The effect is to avoid adding blank lines when copying XML that is already indented. This change does not affect method="html", because the HTML indentation rules are more complex and can easily affect the appearance of text in the browser if applied wrongly.