Please give the trailing slash back to os.tmpdir() · Issue #1669

Please give the trailing slash back to os.tmpdir() · Issue #1669 · nodejs/node

Please revert the commit b57cc51

Since we can get any string (like "/oh/my/xxx/////"), from the environment, why bother to remove the trailing slash? For consistency between __dirname and os.tmpdir() #715 #747 ??