A couple changes

The first change is an update to the formatting used by cmus-info, which, aside from changes the way it formats from cmus:cat to the format function, it also adds some information to the output so I know which part of the output is the title/artist/album.

The second commit is for readability in cmus-query, simplifying the code somewhat from a let to a let*, which avoids the need for the call to setf by evaluating the lets in serial.