Fix comment

docs/_includes/customizer-variables.html

@@ -167,7 +167,7 @@
   <div class="bs-customizer-input">
     <label for="input-@icon-font-svg-id">@icon-font-svg-id</label>
     <input id="input-@icon-font-svg-id" type="text" value="&quot;glyphicons_halflingsregular&quot;" data-var="@icon-font-svg-id" class="form-control"/>
-    <p class="help-block">File name for SVG icon file.</p>
+    <p class="help-block">Element ID within SVG icon file.</p>
   </div>
 </div>
 <h2 id="components">Components</h2>

less/variables.less

@@ -76,7 +76,7 @@
 @icon-font-path:          "../fonts/";
 //** File name for all font files.
 @icon-font-name:          "glyphicons-halflings-regular";
-//** File name for SVG icon file.
+//** Element ID within SVG icon file.
 @icon-font-svg-id:        "glyphicons_halflingsregular";