Revert incorrect changes

Author: mingxwa

docs/spec/make_proxy_view.md

@@ -12,7 +12,7 @@ template <facade F, class T>
 proxy_view<F> make_proxy_view(T& value) noexcept;
 ```
 
-Creates a `proxy_view<F>` object containing a value `p` of type `observer-ptr<T>`, where `*p` is direct-non-list-initialized with `&value`. If [`proxiable_target<T, F>`](proxiable_target.md) is `false`, the program is ill-formed and diagnostic messages are generated.
+Creates a `proxy_view<F>` object containing a value `p` of type `observer-ptr<T>`, where `*p` is direct-non-list-initialized with `std::addressof(value)`. If [`proxiable_target<T, F>`](proxiable_target.md) is `false`, the program is ill-formed and diagnostic messages are generated.
 
 ## Return Value
 

docs/spec/proxiable_target.md

@@ -7,7 +7,7 @@
 
 ```cpp
 template <class T, class F>
-concept proxiable_target = proxiable<observer-ptr<T>, F>;
+concept proxiable_target = proxiable<observer-ptr<T>, observer_facade<F>>;
 ```
 
 See [`make_proxy_view`](make_proxy_view.md) for the definition of the exposition-only class template *observer-ptr*.