message: add test for default xmlns attribute
diff: @@ -37,4 +37,9 @@ describe('Export SVG', function () {
  assert.ok(svg.indexOf('style="style3"') > 0);
  });
  + it('should export with xmlns by default', function () {
  + var svg = makerjs.exporter.toSVG(model);
  + assert.ok(svg.indexOf('xmlns="http://www.w3.org/2000/svg"') > 0);
  + });
  +
  });
  