fmt: make bindings obey formatting

packages/web/build.rs

@@ -2,11 +2,15 @@ use std::{fs::File, io::Write};
 
 fn main() {
     let src = format!(
-        r###"
+        r###"use js_sys::Function;
-use js_sys::Function;
 use wasm_bindgen::prelude::*;
 use web_sys::{{Element, Node}};
 
+/*
+This is an autogenerated file from build.rs.
+Do not edit this file directly.
+*/
+
 #[wasm_bindgen(inline_js = r##"{}"##)]
 extern "C" {{
     pub type Interpreter;

packages/web/src/bindings.rs

@@ -1,8 +1,12 @@
-
 use js_sys::Function;
 use wasm_bindgen::prelude::*;
 use web_sys::{Element, Node};
 
+/*
+This is an autogenerated file from build.rs.
+Do not edit this file directly.
+*/
+
 #[wasm_bindgen(inline_js = r##"export function main() {
     let root = window.document.getElementById("main");
     if (root != null) {