No marginal white space validation added

Author: ajithkumar-maragathavel

app/code/Magento/Cms/view/adminhtml/ui_component/cms_block_form.xml

@@ -105,6 +105,7 @@
             <settings>
                 <validation>
                     <rule name="required-entry" xsi:type="boolean">true</rule>
+                    <rule name="no-marginal-whitespace" xsi:type="boolean">true</rule>
                 </validation>
                 <dataType>text</dataType>
                 <label translate="true">Identifier</label>