nit: fix `all_sccs` comment

diff --git a/src/librustc_data_structures/graph/scc/mod.rs b/src/librustc_data_structures/graph/scc/mod.rs
index 8976e53578164857559cb0fc3e4a797f067a7d20..a989a5401022219d8dd88c083025d121232bb861 100644 (file)
--- a/src/librustc_data_structures/graph/scc/mod.rs
+++ b/src/librustc_data_structures/graph/scc/mod.rs
@@ -54,7 +54,7 @@ pub fn num_sccs(&self) -> usize {
         self.scc_data.len()
     }
 
-    /// Returns the number of SCCs in the graph.
+    /// Returns an iterator over the SCCs in the graph.
     pub fn all_sccs(&self) -> impl Iterator<Item = S> {
         (0 .. self.scc_data.len()).map(S::new)
     }