Introduced by 2e0003eda4. We were
missing a attributesEmitted=true which caused the output from
toHtml() to sometimes be invalid when using pixel sizes to
specify the font size.
Task-number: QTBUG-25778
Change-Id: Ied61fcaef425a590d71c0b52292ac676cb88ba52
Reviewed-by: Qt Doc Bot <qt_docbot@qt-project.org>
Reviewed-by: Jiang Jiang <gzjjgod@gmail.com>