CSS line-height appears to be supported by rich text but isn't mentioned in documentation

I note the CSS property "line-height" appears to work as expected in QML rich text items, but isn't mentioned at all in the documentation:

http://qt-project.org/doc/qt-5.1/qtgui/richtext-html-subset.html

I've no idea whether the list there is intended to be or could ever hope to be complete, but line-height is important enough typographically I think it's well worth mentioning.