Js-beautify: Beautification problem with JS Single Line Comment <!--

[Nowasky]

In Javascript <!-- is treated as a single-line comment just like //.

js-beautify works as expected when the line starts with <!--:

Input:
<!--alert(1)commented

Output:
<!--alert(1)commented

Otherwise it will break the syntax:

Input:
alert(1)<!--commented

Output:
alert(1) < !--commented