Update create-a-mutator.mdx

Author: Heathpackard

content/docs/guides/(data-access)/how-to-guides/edit-existing-user-data/create-a-mutator.mdx

@@ -63,10 +63,10 @@ For more information on transformers, see [Transformers](/docs/guides/definition
 
 Finally, select an <Glossary>access policy</Glossary> for the mutator. The access policy controls whether the whether a given write attempt (execute mutator call) is allowed. The simplest access policy always returns true (write permitted). It is possible to create much more fine-grained policies. In this interface, you can:
 
-- Choose a single, pre-existing policy
-- Choose and parametrize a pre-existing <Glossary>access policy template</Glossary>
-- Write and parametrize a new policy template
-- Compose a new policy by taking any of the above actions multiple times and combining those policies with AND or OR logic
+- Choose a single, pre-existing policy.
+- Choose and parametrize a pre-existing <Glossary>access policy template</Glossary>.
+- Write and parametrize a new policy template.
+- Compose a new policy by taking any of the above actions multiple times and combining those policies with AND or OR logic.
 
 For more information on what access policies do, see [Access Policies](/docs/guides/definitions/access-policies). For more information on creating access policies, see our [How To Guide on Creating Access Policies](/docs/guides/how-to-guides/create-an-access-policy).