If you are seeing a line break there, then the issue will be with another plugin conflicting with SSP. Please deactivate all of your other plugins and then reactivate them one-by-one while reloading the podcast RSS feed in between each reactivation. That will help you find the plugin that is causing a conflict.
If no plugins are conflicting then switch to a default WP theme (like Twenty Fifteen) and test again.
Basically - this is not an issue in SSP, but it is coming from something else.
Let me know how your testing goes.
Cheers,
Hugh
