1 files changed, 5 insertions, 1 deletions
diff --git a/tests/ui/ptr_ops/ptr-swap-basic.rs b/tests/ui/ptr_ops/ptr-swap-basic.rs
index b104c3ade42..ce230feeb32 100644
--- a/tests/ui/ptr_ops/ptr-swap-basic.rs
+++ b/tests/ui/ptr_ops/ptr-swap-basic.rs
@@ -1,9 +1,13 @@
+//! Check the basic functionality of `std::mem::swap` to ensure it correctly
+//! exchanges the values of two mutable variables.
+
 //@ run-pass
 
 use std::mem::swap;
 
 pub fn main() {
-    let mut x = 3; let mut y = 7;
+    let mut x = 3;
+    let mut y = 7;
     swap(&mut x, &mut y);
     assert_eq!(x, 7);
     assert_eq!(y, 3);