Fixed Node test script

cheerio.js chokes on the data-source attribute added to <script>
elements recently.
Merge pull request #226 from webbedspace/node-test-fix

Fixed Node test script
Fixed whitespace

In addition to removing tabs from data-es6.js, this also fixes an
inconsistency for Windows node - JSON.stringify() outputs \r\n for
line-break-containing strings in Windows instead of \n.