reference to font.b, when i believe they meant font.bold

http://qt-project.org/doc/qt-5.0/qtqml/qtqml-typesystem-basictypes.html

Correction:
I believe "and b properties" should be "and bold properties"

Phrase:
Some basic types have properties: for example, the font type has pixelSize, family and b properties.

Font:
http://qt-project.org/doc/qt-5.0/qtquick/qml-font.html does not list a font.b, therefore it must have been intended to be font.bold

Cheers!