js2r-contract-node-at-point not behaving as expected

[jaredwindover]

class A {
    f() {
	var a = {
	    b: 1,
	    c: 'def'
	};
    };
};

If I place my cursor at the front of the word 'b' in the above block, and I execute js2r-contract-node-at-point, I receive the following:

class A {
    f() {
	var a = { b: 1, c: 'def'
 };
    };
};

Calling it again from the same spot returns the expected output:

class A {
    f() {
	var a = { b: 1, c: 'def' };
    };
};

I assumed it was due to some cutomization I'd made, but decided to try it without any of my startup scripts today and got that result.

[jaredwindover]

I'm using tabs and spaces, and that seems to be sufficient to cause the problem. The following is tab indented once, and uses spaces for alignment:

	var a = {
	    b: 1,
	    c: 'def'
	};

It results in:

	var a = { b: 1, c: 'def'
 };

It seems the problem is with js2r--ensure-just-one-space. Executing from behind the curly brace with the below string:

	};

results in:

 };

whereas it should clear the newline (and does if it's spaces instead of a tab).

This is the function that's being called:

(defun js2r--ensure-just-one-space ()
  (interactive)
  (while (or (looking-at "\s*\n")
             (looking-back "\n\s*"))
    (when (looking-at "\n")
      (delete-char 1))
    (when (looking-back "\n\s")
      (backward-char)
      (delete-char -1))
    (just-one-space))
(just-one-space))

Is \s in those regexs matching a single space, or all whitespace characters?