two doc comments

src/complexagent.rs

@@ -70,6 +70,7 @@ impl FutureMoves {
         }
     }
 
+    /// Create all future moves based on struct fields
     pub fn generate(&mut self, board: &Board, color: Piece) {
         self.arena.clear();
         self.current_depth = 0;
@@ -79,6 +80,7 @@ impl FutureMoves {
         self.extend_layers(root_nodes, color, self.max_depth);
     }
 
+    /// Generate children for all children of `nodes`
     fn extend_layers(
         &mut self,
         nodes: impl Iterator<Item = usize>,