Mention the queueueue-ness of mpsc.

Fixes #21915

diff --git a/src/libstd/sync/mpsc/mod.rs b/src/libstd/sync/mpsc/mod.rs
index 39c57a21d752ade70be4cf47b70ed3edf2fff240..2e60d684d6823aeb82a8c4248ad9fe8053a809ea 100644 (file)
--- a/src/libstd/sync/mpsc/mod.rs
+++ b/src/libstd/sync/mpsc/mod.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-//! Multi-producer, single-consumer communication primitives threads
+//! Multi-producer, single-consumer FIFO queue communication primitives.
 //!
 //! This module provides message-based communication over channels, concretely
 //! defined among three types: