Don't prepend filename in href if target is in the same chunk as source link node.
Don't prepend filename in href if target is in the same chunk as source link node.

oreillymedia/HTMLBook,wastemobile/HTMLBook,mushroomgithub/HTMLBook,mushroomgithub/HTMLBook,gitenberg-dev/HTMLBook,macmillanpublishers/HTMLBook,oreillymedia/HTMLBook,macmillanpublishers/HTMLBook,gitenberg-dev/HTMLBook,gitenberg-dev/HTMLBook,mushroomgithub/HTMLBook,oreillymedia/HTMLBook,wastemobile/HTMLBook,macmillanpublishers/HTMLBook