In 2021 - use ES6 Template Literals for this task. If you need IE11 Support - use a transpiler.
let a = `something something`;
Template Literals are fast, powerful and produce cleaner code.
If you need IE11 support and you don't have transpiler, stay strong and use \xa0
- it is a NO-BREAK SPACE char.
Reference from UTF-8 encoding table and Unicode characters, you can write as below:
var a = 'something' + '\xa0\xa0\xa0\xa0\xa0\xa0\xa0' + 'something';