add 'selector' option motivation to tooltip docs

diff --git a/docs/_includes/js/tooltips.html b/docs/_includes/js/tooltips.html
index 4d91da640b5afb551300fa8060d2cc094491a72e..72096b36893eb65d5b0b2edb596f3c453a919a3f 100644 (file)
--- a/docs/_includes/js/tooltips.html
+++ b/docs/_includes/js/tooltips.html
@@ -124,7 +124,7 @@ $('#example').tooltip(options)
          <td>selector</td>
          <td>string</td>
          <td>false</td>
-         <td>If a selector is provided, tooltip objects will be delegated to the specified targets.</td>
+         <td>If a selector is provided, tooltip objects will be delegated to the specified targets. In practice, this is used to enable dynamic HTML content to have tooltips added. See <a href="https://github.com/twbs/bootstrap/issues/4215">this</a> and <a href="http://jsfiddle.net/fScua/">an informative example</a>.</td>
        </tr>
        <tr>
          <td>template</td>