fix comment

Author: lcnr

compiler/rustc_trait_selection/src/solve/search_graph.rs

@@ -43,9 +43,9 @@ struct StackEntry<'tcx> {
     /// Whether this entry is a non-root cycle participant.
     ///
     /// We must not move the result of non-root cycle participants to the
-    /// global cache. See [SearchGraph::cycle_participants] for more details.
-    /// We store the highest stack depth of a head of a cycle this goal is involved
-    /// in. This necessary to soundly cache its provisional result.
+    /// global cache. We store the highest stack depth of a head of a cycle
+    /// this goal is involved in. This necessary to soundly cache its
+    /// provisional result.
     non_root_cycle_participant: Option<StackDepth>,
 
     encountered_overflow: bool,