Beautify ha-attribute <pre> (#8101)

src/components/ha-attributes.ts

@@ -77,6 +77,9 @@ class HaAttributes extends LitElement {
       pre {
         font-family: inherit;
         font-size: inherit;
+        margin: 0px;
+        overflow-wrap: break-word;
+        white-space: pre-line;
       }
     `;
   }