Rename Namespace::none() to const Namespace::ROOT
diff --git a/syntax/file.rs b/syntax/file.rs
index 931ce6e..33340d8 100644
--- a/syntax/file.rs
+++ b/syntax/file.rs
@@ -36,7 +36,7 @@
 
 impl Parse for Module {
     fn parse(input: ParseStream) -> Result<Self> {
-        let namespace = Namespace::none();
+        let namespace = Namespace::ROOT;
         let mut attrs = input.call(Attribute::parse_outer)?;
         let vis: Visibility = input.parse()?;
         let unsafety: Option<Token![unsafe]> = input.parse()?;