Enable @stylistic/js/array-bracket-spacing lint

eslint.config.js

@@ -46,6 +46,7 @@ export default [
 				multiline: true,
 				consistent: true,
 			}],
+			"@stylistic/js/array-bracket-spacing": ["warn", "never"],
 			"@stylistic/js/array-bracket-newline": ["warn", "consistent"],
 		},
 	},

state.js

@@ -231,7 +231,7 @@ function insertMessage(list, msg) {
 	}
 	console.assert(insertBefore >= 0, "");
 
-	list = [ ...list ];
+	list = [...list];
 	list.splice(insertBefore, 0, msg);
 	return list;
 }