add remark to AStarNode about tiebreakers

fish/src/bot.rs

@@ -164,6 +164,7 @@ impl core::cmp::Ord for AStarNode {
     fn cmp(&self, other: &Self) -> core::cmp::Ordering {
         let lhs = unsafe { self.0.as_node() };
         let rhs = unsafe { other.0.as_node() };
+        // FIXME: add a deterministic tiebreaker
         lhs.rating().cmp(&rhs.rating()).reverse()
     }
 }