Not possible to generate tag function with parenthesis

[Richienb]

import acorn from 'acorn';
import {generate} from 'astring';

const parsed = acorn.parse('const foo = String.raw`bar`');
const generated = generate(parsed);

console.log(generated);
//=> 'const foo = (String.raw)`bar`'
// Expected: 'const foo = String.raw`bar`'