comma in a comment is eaten

[wojdyr]

buble 0.18.0

class A {
  b (xy/*:[number,number]*/) {
  }
}

is translated to this

var A = function A () {};

A.prototype.b = function b (xy/*:[numbernumber]*/) {
};

Note that the comma from /*:[number,number]*/ gets removed.
(The comment is an annotation for flow.)

Not a big problem, but I thought I better let you know about it.