Simplify reference-to-references

Author: dtolnay

codegen/src/gen.rs

@@ -3,7 +3,7 @@ use inflections::Inflect;
 use proc_macro2::{Ident, Span, TokenStream};
 use syn_codegen::{Data, Definitions, Features, Node};
 
-pub const TERMINAL_TYPES: &[&str] = &["Ident", "Span"];
+pub const TERMINAL_TYPES: [&str; 2] = ["Ident", "Span"];
 
 pub fn under_name(name: &str) -> Ident {
     Ident::new(&name.to_snake_case(), Span::call_site())
@@ -14,7 +14,7 @@ pub fn traverse(
     node: fn(&mut TokenStream, &mut TokenStream, &Node, &Definitions),
 ) -> (TokenStream, TokenStream) {
     let mut types = defs.types.clone();
-    for &terminal in TERMINAL_TYPES {
+    for terminal in TERMINAL_TYPES {
         types.push(Node {
             ident: terminal.to_owned(),
             features: Features::default(),