MP4: Update docs

Author: Serial-ATA

lofty/src/mp4/ilst/atom.rs

@@ -284,13 +284,13 @@ pub enum AtomData {
 	///
 	/// NOTE: This isn't an official data type, but multiple flag atoms exist,
 	///       so this makes them easier to represent. The *real* underlying type
-	///       is `SignedInteger`.
+	///       is [`Self::SignedInteger`].
 	Bool(bool),
 	/// Unknown data
 	///
 	/// Due to the number of possible types, there are many
 	/// **specified** types that are going to fall into this
-	/// variant.
+	/// variant. See [`DataType`] for a list of known types.
 	Unknown {
 		/// The code, or type of the item
 		code: DataType,

lofty/src/mp4/ilst/mod.rs

@@ -841,7 +841,7 @@ impl MergeTag for SplitTagRemainder {
 			picture.pic_type = PictureType::Other;
 
 			merged.atoms.push(Atom {
-				ident: AtomIdent::Fourcc([b'c', b'o', b'v', b'r']),
+				ident: COVR,
 				data: AtomDataStorage::Single(AtomData::Picture(picture)),
 			})
 		}