@Font trumps @B & @I (which is a pity)

Hi,

This tiny document prints the last three 5s in Helvetica Base whereas
I'd hoped it would print the last one in Helvetica Slope and the one
from last in Helvetica Bold.

I guess this is a feature rather than a bug?

@SysInclude{doc}
@Doc
@Text @Begin
@LP
lines @Break{
@Char{five}
@B{@Char{five}}
@I{@Char{five}}
{Helvetica Base}@Font @Char{five}
@B{{Helvetica Base}@Font @Char{five}}
@I{{Helvetica Base}@Font @Char{five}}
}
@End @Text

-- 
Mark Summerfield, Qtrac Ltd, www.qtrac.eu
    C++, Python, Qt, PyQt - training and consultancy
        "Programming in Python 3" - ISBN 0321680561
            http://www.qtrac.eu/py3book.html