Wording.

Clar Charr · Clar Charr · commit 09eeb1c141fc · 2017-08-26T15:15:06.000-04:00
diff --git a/text/0000-non-exhaustive.md b/text/0000-non-exhaustive.md
@@ -468,7 +468,7 @@ println!("{:?}", c);
 ```
 
 Although outside of the defining crate, it will not, because `Config` could, in
-the future, contain private fields in the future.
+the future, contain private fields that the user didn't account for.
 
 ## Changes to rustdoc
 
