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The `<text:p>` node can contain the string value directly or contain child elements. In this case, whitespaces contain in the child elements should be replaced by their XML equivalent: - space => `<text:s />` - tab => `<text:tab />` - line break => `<text:line-break />` @see https://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#__RefHeading__1415200_253892949