examples/fields.md in mailerlite-1.2.0 vs examples/fields.md in mailerlite-1.3.0

@@ -14,12 +14,13 @@
 ```
 
 ## Update custom field in account
 
 ```ruby
-client.update_field(id, { title: 'New title' })
+client.update_field(id, title: 'New title')
 ```
 
-##Remove custom field from account
+## Remove custom field from account
+
 ```ruby
 client.delete_field(id)
 ```