Merge pull request #14966 from krautcomputing/whitespace_fix

fix whitespace in js dropdown docs

docs/_includes/js/dropdowns.html

@@ -124,7 +124,7 @@
 <div class="dropdown">
   <button id="dLabel" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
     Dropdown trigger
-   <span class="caret"></span>
+    <span class="caret"></span>
   </button>
   <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
     ...