cleaned up some tests

1 files changed, 5 insertions, 3 deletions

diff --git a/tests/ui/lint/missing-debug-implementations-lint.rs b/tests/ui/lint/missing-debug-implementations-lint.rs
index 3abc0706887..8a93f052f9c 100644
--- a/tests/ui/lint/missing-debug-implementations-lint.rs
+++ b/tests/ui/lint/missing-debug-implementations-lint.rs
@@ -1,3 +1,7 @@
+//! Test the `missing_debug_implementations` lint that warns about public types without Debug.
+//!
+//! See https://github.com/rust-lang/rust/issues/20855
+
 //@ compile-flags: --crate-type lib
 #![deny(missing_debug_implementations)]
 #![allow(unused)]
@@ -10,7 +14,6 @@ pub enum A {} //~ ERROR type does not implement `Debug`
 pub enum B {}
 
 pub enum C {}
-
 impl fmt::Debug for C {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         Ok(())
@@ -23,15 +26,14 @@ pub struct Foo; //~ ERROR type does not implement `Debug`
 pub struct Bar;
 
 pub struct Baz;
-
 impl fmt::Debug for Baz {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         Ok(())
     }
 }
 
+// Private types should not trigger the lint
 struct PrivateStruct;
-
 enum PrivateEnum {}
 
 #[derive(Debug)]