update ui tests

src/test/ui/enums-pats-not-idents.stderr

@@ -6,3 +6,4 @@ LL |     let a(1) = 13;
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0531`.

src/test/ui/issues/issue-5927.stderr

@@ -12,4 +12,5 @@ LL |         x(1) => x(1)
 
 error: aborting due to 2 previous errors
 
-For more information about this error, try `rustc --explain E0425`.
+Some errors have detailed explanations: E0425, E0531.
+For more information about an error, try `rustc --explain E0425`.

src/test/ui/keyword/keyword-self-as-identifier.stderr

@@ -6,3 +6,4 @@ LL |     let Self = 22;
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0531`.

src/test/ui/resolve/resolve-assoc-suggestions.stderr

@@ -54,5 +54,5 @@ LL |         method;
 
 error: aborting due to 9 previous errors
 
-Some errors have detailed explanations: E0412, E0425.
+Some errors have detailed explanations: E0412, E0425, E0531.
 For more information about an error, try `rustc --explain E0412`.

src/test/ui/self/self_type_keyword-2.stderr

@@ -24,4 +24,5 @@ LL |         Foo { x: Self } => (),
 
 error: aborting due to 4 previous errors
 
-For more information about this error, try `rustc --explain E0432`.
+Some errors have detailed explanations: E0432, E0531.
+For more information about an error, try `rustc --explain E0432`.

src/test/ui/self/self_type_keyword.stderr

@@ -80,4 +80,5 @@ LL | struct Bar<'Self>;
 
 error: aborting due to 12 previous errors
 
-For more information about this error, try `rustc --explain E0392`.
+Some errors have detailed explanations: E0392, E0531.
+For more information about an error, try `rustc --explain E0392`.