[Doc] Fix the <ReferenceManyToManyInput mutationOption={{onError}}> doc

docs/ReferenceManyToManyInput.md

@@ -210,40 +210,40 @@ You can for instance use it to pass [a custom meta](./Actions.md#meta-parameter)
 
 {% endraw %}
 
-## `perPage`
+You can also use it to pass an `onError` function as follows:
 
-By default, react-admin displays at most 25 entries from the associative table (e.g. 25 `performances`). You can change the limit by setting the `perPage` prop:
+{% raw %}
 
 ```tsx
 <ReferenceManyToManyInput
     reference="venues"
     through="performances"
     using="band_id,venue_id"
-    perPage={10}
+    mutationOptions={{ 
+        onError: (error, step, data) => console.warn({ error, step, data })
+    }}
 >
     {/* ... */}
 </ReferenceManyToManyInput>
 ```
 
-You can also use it to pass an `onError` function as follows:
+{% endraw %}
 
-{% raw %}
+## `perPage`
+
+By default, react-admin displays at most 25 entries from the associative table (e.g. 25 `performances`). You can change the limit by setting the `perPage` prop:
 
 ```tsx
 <ReferenceManyToManyInput
     reference="venues"
     through="performances"
     using="band_id,venue_id"
-    mutationOptions={{ 
-        onError: (error, step, data) => console.warn({ error, step, data })
-    }}
+    perPage={10}
 >
     {/* ... */}
 </ReferenceManyToManyInput>
 ```
 
-{% endraw %}
-
 ## `perPageChoices`
 
 `<ReferenceManyToManyInput>` displays a list of possible values from the reference table (e.g. `venues`) as suggestions in the input. It uses the `getList()` dataProvider call to fetch these possible values.