Fix htmldocck naming

After renaming the structs and enums the htmldocck strings still
contained the old names. This lead to test failure.

These htmldocck tests have been updated to use the proper names of the
rust structs and traits.

Author: chrisduerr

src/test/rustdoc/issue-46380-2.rs

@@ -10,10 +10,10 @@
 
 pub trait PublicTrait<T> {}
 
-// @has issue_46380_2/struct.Public.html
+// @has issue_46380_2/struct.PublicStruct.html
 pub struct PublicStruct;
 
-// @!has - '//*[@class="impl"]' 'impl Add<Private> for Public'
+// @!has - '//*[@class="impl"]' 'impl PublicTrait<PrivateStruct> for PublicStruct'
 impl PublicTrait<PrivateStruct> for PublicStruct {}
 
 struct PrivateStruct;