diff --git a/spec/arc-spec.js b/spec/arc-spec.js
index 1c00224..f306548 100644
--- a/spec/arc-spec.js
+++ b/spec/arc-spec.js
@@ -212,7 +212,7 @@ describe('c3 chart arc', function () {
                             values: [30, 80, 95]
                         }
                     }
-                }
+                };
             });
             var arcColor = ['#60b044', '#f6c600', '#f97600', '#ff0000'];
 
@@ -220,7 +220,7 @@ describe('c3 chart arc', function () {
                 it('each data_column should have one arc', function () {
                     chart.internal.main.selectAll('.c3-chart-arc .c3-arc').each(function (d, i) {
                         expect(d3.select(this).classed('c3-chart-data-' + args.data.columns[i][0])).toBeTruthy();
-                    })
+                    });
                 });
 
                 it('each arc should have the color from color_pattern if color_treshold is given ', function () {
@@ -234,11 +234,11 @@ describe('c3 chart arc', function () {
                 it('each data_column should have one background', function () {
                     chart.internal.main.selectAll('.c3-chart-arcs path.c3-chart-arcs-background').each(function (d, i) {
                         expect(d3.select(this).classed('c3-chart-arcs-background-'+ i)).toBeTruthy();
-                    })
+                    });
                 });
 
                 it('each background should have tbe same color', function () {
-                    chart.internal.main.selectAll('.c3-chart-arcs path.c3-chart-arcs-background').each(function (d, i) {
+                    chart.internal.main.selectAll('.c3-chart-arcs path.c3-chart-arcs-background').each(function () {
                         expect(d3.select(this).style('fill')).toBe('#e0e0e0');
                     });
                 });
@@ -248,11 +248,11 @@ describe('c3 chart arc', function () {
                 it('each data_column should have a label', function () {
                     chart.internal.main.selectAll('.c3-chart-arc .c3-gauge-value').each(function (d, i) {
                         expect(d3.select(this).text()).toBe(args.data.columns[i][1]);
-                    })
+                    });
                 });
 
                 it('each label should have the same color', function () {
-                    chart.internal.main.selectAll('.c3-chart-arc .c3-gauge-value').each(function (d, i) {
+                    chart.internal.main.selectAll('.c3-chart-arc .c3-gauge-value').each(function () {
                         expect(d3.select(this).style('fill')).toBe('#000');
                     });
 
@@ -276,7 +276,7 @@ describe('c3 chart arc', function () {
                 it('each data_column should have a labelline', function () {
                     chart.internal.main.selectAll('.c3-chart-arc .c3-arc-label-line').each(function (d, i) {
                         expect(d3.select(this).classed('c3-data-' + args.data.columns[i][0])).toBeTruthy();
-                    })
+                    });
                 });
 
                 it('each labelline should have the color from color_pattern if color_treshold is given', function () {
diff --git a/spec/legend-spec.js b/spec/legend-spec.js
index 06b5b20..ff67cb1 100644
--- a/spec/legend-spec.js
+++ b/spec/legend-spec.js
@@ -292,7 +292,7 @@ describe('c3 chart legend', function () {
                         values: [30, 80, 95]
                     }
                 }
-            }
+            };
         });
 
         // espacially for gauges with multiple arcs to have the same coloring between legend tiles, tooltip tiles and arc
@@ -305,7 +305,7 @@ describe('c3 chart legend', function () {
             expect(tileColor[1]).toBe('rgb(246, 198, 0)');
             expect(tileColor[2]).toBe('rgb(249, 118, 0)');
             expect(tileColor[3]).toBe('rgb(255, 0, 0)');
-        })
+        });
     });
 
     describe('legend item tile coloring without color_treshold', function () {
@@ -324,7 +324,7 @@ describe('c3 chart legend', function () {
                     }
                 },
                 type: 'gauge'
-            }
+            };
         });
 
         it('selects the color from data_colors, data_color or default', function () {
@@ -336,6 +336,6 @@ describe('c3 chart legend', function () {
             expect(tileColor[1]).toBe('rgb(31, 119, 180)');
             expect(tileColor[2]).toBe('rgb(255, 127, 14)');
             expect(tileColor[3]).toBe('rgb(139, 0, 139)');
-        })
+        });
     });
 });
diff --git a/src/arc.js b/src/arc.js
index cb79bfb..322262c 100644
--- a/src/arc.js
+++ b/src/arc.js
@@ -105,7 +105,7 @@ c3_chart_internal_fn.getArc = function (d, withoutUpdate, force) {
 
 
 c3_chart_internal_fn.transformForArcLabel = function (d) {
-    var $$ = this,
+    var $$ = this, config = $$.config,
         updated = $$.updateAngle(d), c, x, y, h, ratio, translate = "", hasGauge = $$.hasType('gauge');
     if (updated && !hasGauge) {
         c = this.svgArc.centroid(updated);
@@ -461,7 +461,7 @@ c3_chart_internal_fn.redrawArc = function (duration, durationForExit, withTransf
         backgroundArc = $$.arcs.select('g.' + CLASS.chartArcsBackground).selectAll('path.' + CLASS.chartArcsBackground).data($$.data.targets);
         backgroundArc.enter().append("path");
         backgroundArc
-            .attr("class", function (d, i) { return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground +'-'+ i})
+            .attr("class", function (d, i) { return CLASS.chartArcsBackground + ' ' + CLASS.chartArcsBackground +'-'+ i; })
             .attr("d", function (d1) {
                 if ($$.hiddenTargetIds.indexOf(d1.id) >= 0) { return "M 0 0"; }