Revise link_name text

Author: traviscross

src/items/external-blocks.md

@@ -395,30 +395,30 @@ r[items.extern.attributes.link_name]
 ### The `link_name` attribute
 
 r[items.extern.attributes.link_name.intro]
-The *`link_name` [attribute][attributes]* may be specified on declarations inside an `extern` block to indicate the symbol to import for the given function or static.
+The *`link_name` [attribute][attributes]* may be applied to declarations inside an `extern` block to specify the symbol to import for the given function or static.
 
 > [!EXAMPLE]
 > ```rust
-> unsafe extern {
+> unsafe extern "C" {
 >     #[link_name = "actual_symbol_name"]
 >     safe fn name_in_rust();
 > }
 > ```
 
 r[items.extern.attributes.link_name.syntax]
-The `link_name` attribute uses the [MetaNameValueStr] syntax to specify the name of the symbol.
+The `link_name` attribute uses the [MetaNameValueStr] syntax.
 
 r[items.extern.attributes.link_name.allowed-positions]
-The `link_name` attribute may be specified on a function or static in an `extern` block.
+The `link_name` attribute may only be applied to a function or static item in an `extern` block.
 
 > [!NOTE]
-> `rustc` currently warns in other positions, but this may be rejected in the future.
+> `rustc` currently accepts and ignores the attribute in other positions but lints against it. This may become a hard error in the future.
 
 r[items.extern.attributes.link_name.duplicates]
 Only the last instance of `link_name` on an item is used to determine the symbol name.
 
 > [!NOTE]
-> `rustc` currently warns on preceding duplicate `link_name` attributes. This may become an error in the future.
+> `rustc` lints against duplicate use of this attribute on uses preceding the last. This may become a hard error in the future.
 
 r[items.extern.attributes.link_name.link_ordinal]
 The `link_name` attribute may not be used with the [`link_ordinal`] attribute.