bug#20896: 25.0.50; [js-mode][FR] support chain syntax indentation

[Rasmus <rasmus@gmx.us>]

Hi,

Rasmus <rasmus@gmx.us> writes:

> var an_axis = axes.append("g")
>                   .call(d3.svg.axis()
>                           .scale(Scale)
>                           .orient("bottom"));


Actually, this case is not as crazy as first assumed and should ideally be
supported.  Here's a pretty reasonable example (except for names being too
long):

      plot.axes.yScale = d3.scale.ordinal()
                           .domain(d3.range(bar.ybins).map(function(d){return d*10;}))
                           .range(d3.range(bar.ybins)
                                    .map(function(d,i) {
                                        return plot.height-plot.height/bar.ybins * i;}));


Also, notice there's another, potential, indentation typo in this code.
The last "return" should be one character to the right IMO, i.e.

    .map(function(d,i) {
         return plot.height-plot.height/bar.ybins * i;}));

Thanks,
Rasmus

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