Increase left margin when Y axis is off

src/size.js

@@ -22,7 +22,7 @@ c3_chart_internal_fn.getCurrentPaddingLeft = function (withoutRecompute) {
     } else if (config.axis_rotated) {
         return !config.axis_x_show ? 1 : Math.max(ceil10($$.getAxisWidthByAxisId('x', withoutRecompute)), 40);
     } else if (!config.axis_y_show || config.axis_y_inner) { // && !config.axis_rotated
-        return $$.getYAxisLabelPosition().isOuter ? 30 : 1;
+        return $$.getYAxisLabelPosition().isOuter ? 30 : 10;
     } else {
         return ceil10($$.getAxisWidthByAxisId('y', withoutRecompute));
     }