Use & as author separator

And set properly the separators on other fields

templates/list_edit.html

@@ -36,7 +36,7 @@
 		  <span class="text-muted">{{if .Publisher}}{{.Publisher}}{{end}}</span>
 		</p>
 		<div class="card-text row">
-		  <p class="col-9">{{range .Authors}}{{.}}, {{end}}</p>
+		  <p class="col-9">{{strings_join .Authors "& "}}</p>
 		  <div class="col-3">
 			<div class="btn-group d-flex justify-content-end">
 	          <a href="/list/{{$listID}}/remove/{{.ID}}" class="btn btn-danger">