Touch up PR 2303

Author: dtolnay

serde/src/private/de.rs

@@ -1263,14 +1263,15 @@ mod content {
             match self.content {
                 Content::Unit => visitor.visit_unit(),
 
-                // As a special case, allow deserializing newtype variant containing unit. E.G:
-                // #[derive(Deserialize)]
-                // #[serde(tag = "result")]
-                // enum Response<T> {
-                //     Success(T),
-                // }
+                // Allow deserializing newtype variant containing unit.
                 //
-                // We want {"result": "Success"} to deserialize into `Response<T>`.
+                //     #[derive(Deserialize)]
+                //     #[serde(tag = "result")]
+                //     enum Response<T> {
+                //         Success(T),
+                //     }
+                //
+                // We want {"result":"Success"} to deserialize into Response<()>.
                 Content::Map(ref v) if v.is_empty() => visitor.visit_unit(),
                 _ => Err(self.invalid_type(&visitor)),
             }