bug#9151: js-mode indentation doesn't recognize brace-less function expressions

[Knut Olav Bøhmer]

This bug is probably more important to day then 8 years ago because of the widely used  arrow function with concise body syntax as documented here:

https://developer.mozilla.org/en-US/docs/Web/_javascript_/Reference/Functions/Arrow_functions#Function_body

Right:
const something = () =>
      indent_like_this();

Wrong:
const something = () =>
not_indent_like_this();

--

Knut Olav Bøhmer