I saw the changes that you made in files.texi to try to distinguish
the two uses of "fileset". In effect, those changes tell the reader,
"please be aware of this ambiguity and cope with it". That does not
solve the problem. What is needed is to remove the ambiguity.
One way to do this is to find TWO modifiers. One concept could be "VC
fileset" and the other could be "XYZ fileset". I can't think of a
suitable word to use in place of XYZ; can anyone else?
The other way is to rename one of these concepts entirely. Renaming
the VC one is better since it is new, and thus not an incompatible
change.