Index: wp-admin/includes/class-wp-plugin-install-list-table.php
===================================================================
--- wp-admin/includes/class-wp-plugin-install-list-table.php	(revision 29123)
+++ wp-admin/includes/class-wp-plugin-install-list-table.php	(working copy)
@@ -414,7 +414,7 @@
 					<div class="action-links">
 						<?php
 							if ( ! empty( $action_links ) ) {
-								echo '<ul class="plugin-action-buttons"><li>' . implode( '</li><li>', $action_links ) . '</li>';
+								echo '<ul class="plugin-action-buttons"><li>' . implode( '</li><li>', $action_links ) . '</li></ul>';
 							}
 						?>
 					</div>