Rename test for issue 21058

Author: rytheo

library/std/tests/issue-21058.rs renamed to library/std/tests/type-name-unsized.rs

@@ -18,24 +18,24 @@ macro_rules! check {
     };
 }
 
+/// Tests that [`std::any::type_name`] supports unsized types.
 #[test]
-fn issue_21058() {
-    // type_name should support unsized types
+fn type_name_unsized() {
     check!([u8], "[u8]");
     check!(str, "str");
     check!(dyn Send, "dyn core::marker::Send");
-    check!(NT, "issue_21058::NT");
-    check!(DST, "issue_21058::DST");
+    check!(NT, "type_name_unsized::NT");
+    check!(DST, "type_name_unsized::DST");
     check!(&i32, "&i32");
     check!(&'static i32, "&i32");
     check!((i32, u32), "(i32, u32)");
-    check!(val: foo(), "issue_21058::Foo");
-    check!(val: Foo::new, "issue_21058::Foo::new");
+    check!(val: foo(), "type_name_unsized::Foo");
+    check!(val: Foo::new, "type_name_unsized::Foo::new");
     check!(val:
         <Foo as Debug>::fmt,
-        "<issue_21058::Foo as core::fmt::Debug>::fmt"
+        "<type_name_unsized::Foo as core::fmt::Debug>::fmt"
     );
-    check!(val: || {}, "issue_21058::issue_21058::{{closure}}");
+    check!(val: || {}, "type_name_unsized::type_name_unsized::{{closure}}");
     bar::<i32>();
 }