Line breaks are being added to Google Maps image URL in email code

Hi everyone,

I am trying to include a Google Maps image in an email template as a background image. The URLs for these images, as generated by Google, are really long.

When working locally, everything is fine, but as soon as I upload my template into Marketo the map stops working because the URL is being split over multiple lines in the HTML.

This is what the URL looks like after it has been imported into Marketo, and also after it has been sent:

Line breaks are being added in two places. As soon as I remove them everything works as expected.

How can I prevent Marketo from adding line breaks to my code?

Any help much appreciated!