Style for instrumental Songs
Tracks labeled as instrumental should be listed as Title (instrumental) with the word instrumental without abbreviation and all lowercase. This is consistent with StylePrinciple.
Note that this is different from the case where instrumental is version info, i.e., there is a regular version with vocals and an instrumental version. In that case, which is covered by RemixStyle, it is to be included anyways.
He Loves U Not (instrumental)