Update ui test suite to nightly-2021-10-07

tests/ui/source-enum-not-error.stderr

@@ -1,17 +1,28 @@
 error[E0599]: the method `as_dyn_error` exists for reference `&NotError`, but its trait bounds were not satisfied
-  --> $DIR/source-enum-not-error.rs:10:9
-   |
-4  | pub struct NotError;
-   | --------------------
-   | |
-   | doesn't satisfy `NotError: AsDynError`
-   | doesn't satisfy `NotError: std::error::Error`
+   --> $DIR/tests/ui/source-enum-not-error.rs:10:9
+    |
+4   | pub struct NotError;
+    | --------------------
+    | |
+    | doesn't satisfy `NotError: AsDynError`
+    | doesn't satisfy `NotError: std::error::Error`
 ...
-10 |         source: NotError,
-   |         ^^^^^^ method cannot be called on `&NotError` due to unsatisfied trait bounds
-   |
-   = note: the following trait bounds were not satisfied:
-           `NotError: std::error::Error`
-           which is required by `NotError: AsDynError`
-           `&NotError: std::error::Error`
-           which is required by `&NotError: AsDynError`
+10  |         source: NotError,
+    |         ^^^^^^ method cannot be called on `&NotError` due to unsatisfied trait bounds
+    |
+    = note: the following trait bounds were not satisfied:
+            `NotError: std::error::Error`
+            which is required by `NotError: AsDynError`
+            `&NotError: std::error::Error`
+            which is required by `&NotError: AsDynError`
+note: the following trait must be implemented
+   --> $RUST/std/src/error.rs
+    |
+    | / pub trait Error: Debug + Display {
+    | |     /// The lower-level source of this error, if any.
+    | |     ///
+    | |     /// # Examples
+...   |
+    | |     }
+    | | }
+    | |_^