bring back the comma!

client/homebrew/pages/basePages/listPage/brewItem/brewItem.jsx

@@ -141,13 +141,13 @@ const BrewItem = createClass({
 				</> : <></>
 				}
 				<span title={`Authors:\n${brew.authors?.join('\n')}`}>
-					<i className='fas fa-user'/> 
-					{brew.authors?.map((author, index) => (
+					<i className='fas fa-user'/> {brew.authors?.map((author, index) => (
 						<React.Fragment key={index}>
 							{author === 'hidden'
 								? <span title="Username contained an email address; hidden to protect user's privacy">{author}</span>
 								: <a href={`/user/${author}`}>{author}</a>
 							}
+							{index < brew.authors.length - 1 && ', '}
 						</React.Fragment>
 					))}
 				</span>