Fixes #11799: Mention support of number of add-ons in docs

components.html

@@ -1552,6 +1552,7 @@ base_url: "../"
 
 
     <h2 id="input-groups-basic">Basic example</h2>
+    <p>Place one add-on or button on either side of an input. You may also place one on both sides of an input. <strong class="text-danger">We do not support mutiple add-ons on a single side.</strong></p>
     <form class="bs-example bs-example-form" role="form">
       <div class="input-group">
         <span class="input-group-addon">@</span>