Update docs

Author: khvzak

src/state.rs

@@ -1459,7 +1459,7 @@ impl Lua {
     }
 
     /// Calls the given function with a [`Scope`] parameter, giving the function the ability to
-    /// create userdata and callbacks from Rust types that are `!Send`` or non-`'static`.
+    /// create userdata and callbacks from Rust types that are `!Send` or non-`'static`.
     ///
     /// The lifetime of any function or userdata created through [`Scope`] lasts only until the
     /// completion of this method call, on completion all such created values are automatically

src/traits.rs

@@ -226,6 +226,7 @@ pub trait LuaNativeFnMut<A: FromLuaMulti> {
 
 /// A trait for types that returns a future and can be used as Lua functions.
 #[cfg(feature = "async")]
+#[cfg_attr(docsrs, doc(cfg(feature = "async")))]
 pub trait LuaNativeAsyncFn<A: FromLuaMulti> {
     type Output: IntoLuaMulti;