Mensural flags

[Phil Holmes]

In the NR, under 
http://www.lilypond.org/doc/v2.17/Documentation/notation/typesetting-mensural-music#mensural-flags 
under known issues and warnings, we have

"The attachment of ancient flags to stems is slightly off."

That was http://code.google.com/p/lilypond/issues/detail?id=3105, fixed in 
the latest development release.  Any objections to me deleting this line and 
pushing the change to staging?

--
Phil Holmes