Integrate suggestion from review to improve consistency with existing code.
2 gBrowser.pinTab(gBrowser.selectedTab);
3 var newTab = gBrowser.duplicateTab(gBrowser.selectedTab);
4 ok(!newTab.pinned, "duplicating a pinned tab creates unpinned tab");
5 gBrowser.removeTab(newTab);
6 gBrowser.unpinTab(gBrowser.selectedTab);