Properly closed optgroup

Font-Awesome-HTML-Dropdown-Select-List.md

@@ -15,7 +15,7 @@ Populate your select with this array's format.
 ***
 
 ```
-<select>
+<select class="btn btn-sieltec-primary">
   <optgroup label="Web Application Icons">
     <option value="icon-adjust">icon-adjust</option>
     <option value="icon-asterisk">icon-asterisk</option>
@@ -168,6 +168,7 @@ Populate your select with this array's format.
     <option value="icon-wrench">icon-wrench</option>
     <option value="icon-zoom-in">icon-zoom-in</option>
     <option value="icon-zoom-out">icon-zoom-out</option>
+  </optgroup>
   <optgroup label="Text Editor Icons">
     <option value="icon-file">icon-file</option>
     <option value="icon-file-alt">icon-file-alt</option>
@@ -201,6 +202,7 @@ Populate your select with this array's format.
     <option value="icon-list-ol">icon-list-ol</option>
     <option value="icon-list-ul">icon-list-ul</option>
     <option value="icon-list-alt">icon-list-alt</option>
+  </optgroup>
   <optgroup label="Directional Icons">
     <option value="icon-angle-left">icon-angle-left</option>
     <option value="icon-angle-right">icon-angle-right</option>
@@ -232,6 +234,7 @@ Populate your select with this array's format.
     <option value="icon-hand-up">icon-hand-up</option>
     <option value="icon-circle">icon-circle</option>
     <option value="icon-circle-blank">icon-circle-blank</option>
+  </optgroup>
   <optgroup label="Video Player Icons">
     <option value="icon-play-circle">icon-play-circle</option>
     <option value="icon-play">icon-play</option>
@@ -247,6 +250,7 @@ Populate your select with this array's format.
     <option value="icon-fullscreen">icon-fullscreen</option>
     <option value="icon-resize-full">icon-resize-full</option>
     <option value="icon-resize-small">icon-resize-small</option>
+  </optgroup>
   <optgroup label="Social Icons">
     <option value="icon-phone">icon-phone</option>
     <option value="icon-phone-sign">icon-phone-sign</option>
@@ -264,6 +268,7 @@ Populate your select with this array's format.
     <option value="icon-google-plus">icon-google-plus</option>
     <option value="icon-google-plus-sign">icon-google-plus-sign</option>
     <option value="icon-sign-blank">icon-sign-blank</option>
+  </optgroup>
   <optgroup label="Medical Icons">
     <option value="icon-ambulance">icon-ambulance</option>
     <option value="icon-beaker">icon-beaker</option>
@@ -273,6 +278,6 @@ Populate your select with this array's format.
     <option value="icon-plus-sign-alt">icon-plus-sign-alt</option>
     <option value="icon-stethoscope">icon-stethoscope</option>
     <option value="icon-user-md">icon-user-md</option>
+  </optgroup>
 </select>
-
 ```