Fix typo in Istanbul loader example

[TerrenceLJones]

It seems like the closing ) of the concat is miss-placed here.

In the previous example

const somethingTrue = true;

var module = {
    loaders: [].concat(
        somethingTrue ? {
	    y: 'y'
	} : [],
    ), // note parens placement
    {
	z: 'z'
    }
}

would result in => Uncaught SyntaxError: Unexpected token '{'

In this proposed change:

const x = true;

var module = {
    loaders: [].concat(
        somethingTrue ? {
	    y: 'y'
	} : [],
	{
	    x: 'x'
        }
    ) // note parens placement
}

would result in => Object {loaders: Array(2)}

Am I missing something in the previous version?

[zinserjan]

Thanks.