Revise no_mangle attribute text

Let's revise this section editorially.

Author: traviscross

src/abi.md

@@ -65,7 +65,7 @@ r[abi.no_mangle]
 ## The `no_mangle` attribute
 
 r[abi.no_mangle.intro]
-The *`no_mangle` attribute* may be used on functions and statics to disable standard symbol name mangling. The symbol for the item will be the identifier of the item's name.
+The *`no_mangle` [attribute]* disables the standard symbol name mangling on a [function] or [static]. The symbol for the item is the item's identifier.
 
 > [!EXAMPLE]
 > ```rust
@@ -74,7 +74,7 @@ The *`no_mangle` attribute* may be used on functions and statics to disable stan
 > ```
 
 r[abi.no_mangle.syntax]
-The `no_mangle` attribute uses the [MetaWord] syntax and thus does not take any inputs.
+The `no_mangle` attribute uses the [MetaWord] syntax.
 
 r[abi.no_mangle.allowed-positions]
 The `no_mangle` attribute may only be applied to:
@@ -85,7 +85,7 @@ The `no_mangle` attribute may only be applied to:
 - [Trait impl functions][items.impl.trait]
 
 > [!NOTE]
-> `rustc` currently warns in other positions, but this may be rejected in the future.
+> `rustc` lints against use in other positions. This may become an error in the future.
 
 <!-- TODO: Currently it works on a trait function with a body, but generates a warning about being phased out. how do we document that?
 https://github.com/rust-lang/rust/pull/86492#issuecomment-885682960
@@ -94,32 +94,35 @@ https://github.com/rust-lang/rust/pull/86492#issuecomment-885682960
 <!-- TODO: should this clarify that external block items are already unmangled?, and thus the attribute does nothing? Currently it is "phased out" warning. -->
 
 r[abi.no_mangle.closures]
-`no_mangle` may not be used with a [closure].
+The `no_mangle` attribute may not be used with a [closure].
 
 r[abi.no_mangle.generics]
-`no_mangle` may not be used on an item with generic parameters.
+The `no_mangle` attribute may not be used on an item with generic parameters.
 
 r[abi.no_mangle.duplicates]
-Only the first instance of `no_mangle` on an item is honored. Subsequent `no_mangle` attributes are ignored.
+Only the first use of `no_mangle` on an item has effect.
 
 > [!NOTE]
-> `rustc` currently warns on subsequent duplicate `no_mangle` attributes.
+> `rustc` lints against any use following the first.
 
 r[abi.no_mangle.export_name]
-If `no_mangle` is used with [`export_name`][abi.export_name], then the `export_name` is used instead.
+When the `no_mangle` and [`export_name`][abi.export_name] attributes are both applied to the same item, the symbol name from `export_name` is used, and `no_mangle` has no effect.
+
+> [!NOTE]
+> `rustc` lints against this combination.
 
 r[abi.no_mangle.unsafe]
 The `no_mangle` attribute must be marked with [`unsafe`][attributes.safety] because an unmangled symbol may collide with another symbol with the same name (or with a well-known symbol), leading to undefined behavior.
 
 r[abi.no_mangle.edition2024]
 > [!EDITION-2024]
-> Before the 2024 edition it is allowed to use the `no_mangle` attribute without the `unsafe` qualification.
+> Before the 2024 edition, it is allowed to use the `no_mangle` attribute without `unsafe`.
 
 r[abi.no_mangle.publicly-exported]
-In addition to disabling name mangling, the item will be publicly exported from the produced library or object file, similar to the [`used` attribute](#the-used-attribute).
+In addition to disabling name mangling, the `no_mangle` attribute causes the symbol to be publicly exported from the produced library or object file, similar to the [`used`][abi.used] attribute.
 
 r[abi.no_mangle.ascii-only]
-`no_mangle` may only be used on items with a name that only contains ASCII characters.
+The `no_mangle` attribute may only be used on items with a name that contains only ASCII characters.
 
 r[abi.link_section]
 ## The `link_section` attribute