Replaces hyperlinks in a specified Google Doc.

[metroid-samus]

If the url of a hyperlink contains a placeholder, it will be replaced with the corresponding value in a replacements list.

For example, if we aim to substitute all instances of {{name}} in a Google Doc with netflix, a hyperlink that originally directed to http://www.{{name}}.com will be transformed into http://www.netflix.com

[wssheldon]

It would be relatively easy to unit test the three functions involved here, we can mock response of content from google. I think this would be a good thing to add for this change.

[metroid-samus]

It would be relatively easy to unit test the three functions involved here, we can mock response of content from google. I think this would be a good thing to add for this change.

Done.

[wssheldon]

Looks good.

[wssheldon]

For these external service API tests where we don't control the response we can consider using vrcpy in the future so they're more maintainable.