Merge pull request #6713 from magento-tsg/MC-41432

[Arrows] MC-41432: Unexpected appearance of the "HTML value that contains restricted elements" message after save a product

Author: zakdma

app/code/Magento/Cms/etc/di.xml

@@ -294,6 +294,9 @@
                 <item name="button" xsi:type="string">button</item>
                 <item name="i" xsi:type="string">i</item>
                 <item name="u" xsi:type="string">u</item>
+                <item name="br" xsi:type="string">br</item>
+                <item name="b" xsi:type="string">b</item>
+                <item name="pre" xsi:type="string">pre</item>
             </argument>
             <argument name="allowedAttributes" xsi:type="array">
                 <item name="class" xsi:type="string">class</item>

app/etc/di.xml

@@ -1844,6 +1844,11 @@
                 <item name="hr" xsi:type="string">hr</item>
                 <item name="figure" xsi:type="string">figure</item>
                 <item name="button" xsi:type="string">button</item>
+                <item name="i" xsi:type="string">i</item>
+                <item name="u" xsi:type="string">u</item>
+                <item name="br" xsi:type="string">br</item>
+                <item name="b" xsi:type="string">b</item>
+                <item name="pre" xsi:type="string">pre</item>
             </argument>
             <argument name="allowedAttributes" xsi:type="array">
                 <item name="class" xsi:type="string">class</item>