Double quote replacement

[MCTaylor17]

I'm just reading through the guide Understand OData in 6 steps and noticed the Node.js code was broken.

getURL(serviceRoot + 'People('russellwhyte')');

The MD files in this repo seem to look fine:

getURL(serviceRoot + "People('russellwhyte')");

I'm not sure how the MD files are rendered to the website, but the change from double to single quotes has a significant impact on this particular line of code.