fix example

Author: HeskeyBaozi

examples/custom-icon.js

@@ -78,15 +78,17 @@ class Test extends React.Component {
 
   getSvgIcon = (path) => {
     return (
-      <svg
-        viewBox="0 0 1024 1024"
-        width="1em"
-        height="1em"
-        fill="currentColor"
-        style={{ verticalAlign: '-.125em' }}
-      >
-        <path d={path} p-id="5827"></path>
-      </svg>
+      <i className="arrow">
+        <svg
+          viewBox="0 0 1024 1024"
+          width="1em"
+          height="1em"
+          fill="currentColor"
+          style={{ verticalAlign: '-.125em' }}
+        >
+          <path d={path} p-id="5827"></path>
+        </svg>
+      </i>
     );
   }