Trim Trailing Whitespace

### Description of the bug

We have sponsored articles that outputs `[byline], [organization]` on the front end. Sometimes, editors will accidentally add a trailing whitespace to the end of their name causing the output `Mark , Alley Interactive`. We'd like to have that whitespace trimmed so there is no space after the byline.

### Steps To Reproduce

The issue noted above is project specific. But if you add a whitespace to the end of an author's name using Byline Manager, it will render with the whitespace at the end.

### Additional Information

_No response_