for multi-arc-gauge the radius has changed to let the label fit in the chart

spec/arc-spec.js

@@ -122,7 +122,7 @@ describe('c3 chart arc', function () {
                         .select('g.c3-shapes.c3-shapes-data.c3-arcs.c3-arcs-data')
                         .select('path.c3-shape.c3-shape.c3-arc.c3-arc-data');
 
-                expect(data.attr('d')).toMatch(/M-304,-3\..+A304,304 0 0,1 245\..+,-178\..+L237\..+,-172\..+A294,294 0 0,0 -294,-3\..+Z/);
+                expect(data.attr('d')).toMatch(/-258.4,-3\..+A258.4,258.4 0 0,1 209\..+,-151\..+L200\..+,-146\..+A248.39999999999998,248.39999999999998 0 0,0 -248.39999999999998,-3\..+Z/);
             });
         });
 
@@ -153,7 +153,7 @@ describe('c3 chart arc', function () {
                         .select('path.c3-shape.c3-shape.c3-arc.c3-arc-data');
 
                 // This test has bee updated to make tests pass. @TODO double-check this test is accurate.
-                expect(data.attr('d')).toMatch(/M-221.*?,-2\..+A221.*?,221.*? 0 1,1 -68.*?,210.*?L-65.*?,201.*?A211.*?,211.*? 0 1,0 -211.*?,-2.*?Z/);
+                expect(data.attr('d')).toMatch(/M-180.*?,-2\..+A180.*?,180.*? 0 1,1 -55.*?,171.*?L-52.*?,161.*?A170.*?,170.*? 0 1,0 -170.*?,-2.*?Z/);
             });
 
             describe('with labels use custom text', function() {