Implement platform header formatting

compiler/parse/src/header.rs

@@ -174,7 +174,7 @@ pub struct Effects<'a> {
     pub spaces_after_type_name: &'a [CommentOrNewline<'a>],
     pub effect_shortname: &'a str,
     pub effect_type_name: &'a str,
-    pub entries: &'a [Loc<TypedIdent<'a>>],
+    pub entries: Collection<'a, Loc<TypedIdent<'a>>>,
 }
 
 #[derive(Copy, Clone, Debug, PartialEq)]

compiler/parse/src/module.rs

@@ -718,7 +718,7 @@ fn effects<'a>() -> impl Parser<'a, Effects<'a>, EEffects<'a>> {
                 spaces_after_type_name,
                 effect_shortname: type_shortname,
                 effect_type_name: type_name,
-                entries: entries.items,
+                entries,
             },
             state,
         ))