Errors reported by Travis CI, 3rd pass.

c3.js

@@ -997,7 +997,7 @@
             if (isGaugeType(d.data)) {
                 var sA = d.startAngle, eA = d.endAngle;
                 var gMin = __gauge_min, gMax = __gauge_max,
-                    gF = Math.abs(gMin) + gMax, fA = Math.abs(sA) + eA,
+                    gF = Math.abs(gMin) + gMax,
                     aTic = (Math.PI) / gF;
                 d.startAngle = (-1 * (Math.PI / 2)) + (aTic * Math.abs(gMin));
                 d.endAngle = d.startAngle + (aTic * ((d.value > gMax) ? gMax : d.value));
@@ -2446,8 +2446,8 @@
 
             if (__axis_rotated) {
                 area = d3.svg.area()
-                    .x0(function (d, i) { return yScaleGetter(d.id)(0); })
+                    .x0(function (d) { return yScaleGetter(d.id)(0); })
-                    .x1(function (d, i) { return yScaleGetter(d.id)(d.value); })
+                    .x1(function (d) { return yScaleGetter(d.id)(d.value); })
                     .y(xx);
             } else {
                 area = d3.svg.area()
@@ -2456,7 +2456,7 @@
                     .y1(function (d, i) { if (__data_groups.length > 0) { var point = getPoint(d, i); return point[1][1]; } return yScaleGetter(d.id)(d.value); });
             }
 
-            return function (d, i) {
+            return function (d) {
                 var data = filterRemoveNull(d.values), x0, y0;
 
                 if (hasType([d], 'area') || hasType([d], 'area-spline')) {
@@ -3798,13 +3798,17 @@
                         };
                     }
 */
-                    if (isNaN(this._current.endAngle)) this._current.endAngle = this._current.startAngle;
+                    if (isNaN(this._current.endAngle)) {
+                      this._current.endAngle = this._current.startAngle;
+                    }
                     interpolate = d3.interpolate(this._current, updated);
                     this._current = interpolate(0);
                     return function (t) { return getArc(interpolate(t), true); };
                 })
                 .attr("transform", withTransform ? "scale(1)" : "")
-                .style("fill", function (d) { return (__gauge_style === 'arc' && __color_values) ? levelColor(d.data.values[0].value) : color(d.data.id); }) // Where gauge reading color would receive customization.//color(d.data); })
+                .style("fill", function (d) {
+                    return (__gauge_style === 'arc' && __color_values) ? levelColor(d.data.values[0].value) : color(d.data.id);
+                }) // Where gauge reading color would receive customization.
                 .style("opacity", (__color_opacity) ? __color_opacity : 1)
                 .call(endall, function () {
                     transiting = false;
@@ -5049,7 +5053,7 @@
         }
         function generateTicks(scale) {
             var i, domain, ticks = [];
-            if (scale.ticks && tickArguments != undefined) {
+            if (scale.ticks && tickArguments !== undefined) {
                 return scale.ticks.apply(scale, tickArguments);
             }
             domain = scale.domain();