copyedit

Author: ethanpalm

components/code-groups.mdx

@@ -30,7 +30,7 @@ class HelloWorld {
 
 ## Language dropdown
 
-You can replace the tabs in a code group with a dropdown menu to toggle between languages using `dropdown` prop.
+You can replace the tabs in a code group with a dropdown menu to toggle between languages using the `dropdown` prop.
 
 <CodeGroup dropdown>
 
@@ -53,7 +53,7 @@ class HelloWorld {
 </CodeGroup>
 
 
-````mdx
+````mdx highlight=1
 <CodeGroup dropdown>
 
 ```javascript helloWorld.js