[board, moves] Update some comments and docs

board/src/board.rs

@@ -71,8 +71,9 @@ impl Board {
     ///
     /// ## Errors
     ///
-    /// When is called with [`PlacePieceStrategy::PreserveExisting`], and a piece already exists on
-    /// `square`, this method returns a [`PlacePieceError::ExistingPiece`] error.
+    /// When is called with [`PlacePieceStrategy::PreserveExisting`], and a
+    /// piece already exists on `square`, this method returns a
+    /// [`PlacePieceError::ExistingPiece`] error.
     ///
     pub fn place_piece(
         &mut self,

board/src/piece_sets.rs

@@ -90,6 +90,7 @@ impl PieceSet {
         self.mailbox.get(square)
     }
 
+    // TODO: Rename this. Maybe get_all() is better?
     pub(crate) fn find_pieces(&self, piece: Piece) -> BitBoard {
         let color_occupancy = self.color_occupancy[piece.color as usize];
         let shape_occupancy = self.shape_occupancy[piece.shape as usize];