Fix list formatting (use periods at end)

Author: handrews

src/oas.md

@@ -1244,10 +1244,10 @@ Assume a parameter named `color` has one of the following values, where the valu
 
 The following table shows serialized examples, as would be shown with the `serializedValue` field of an Example Object, of the different serializations for each value.
 
-* The value _empty_ denotes the empty string, and is unrelated to the `allowEmptyValue` field
-* The behavior of combinations marked _n/a_ is undefined
-* The `undefined` column replaces the `empty` column in previous versions of this specification in order to better align with [RFC6570](https://www.rfc-editor.org/rfc/rfc6570.html#section-2.3) terminology, which describes certain values including but not limited to `null` as "undefined" values with special handling; notably, the empty string is _not_ undefined
-* For `form` and the non-RFC6570 query string styles `spaceDelimited`, `pipeDelimited`, and `deepObject`, see [Appendix C](#appendix-c-using-rfc6570-based-serialization) for more information on constructing query strings from multiple parameters, and [Appendix D](#appendix-d-serializing-headers-and-cookies) for warnings regarding `form` and cookie parameters
+* The value _empty_ denotes the empty string, and is unrelated to the `allowEmptyValue` field.
+* The behavior of combinations marked _n/a_ is undefined.
+* The `undefined` column replaces the `empty` column in previous versions of this specification in order to better align with [RFC6570](https://www.rfc-editor.org/rfc/rfc6570.html#section-2.3) terminology, which describes certain values including but not limited to `null` as "undefined" values with special handling; notably, the empty string is _not_ undefined.
+* For `form` and the non-RFC6570 query string styles `spaceDelimited`, `pipeDelimited`, and `deepObject`, see [Appendix C](#appendix-c-using-rfc6570-based-serialization) for more information on constructing query strings from multiple parameters, and [Appendix D](#appendix-d-serializing-headers-and-cookies) for warnings regarding `form` and cookie parameters.
 * The examples are percent-encoded as required by RFC6570 and RFC3986; see [Appendix E](#appendix-e-percent-encoding-and-form-media-types) for a thorough discussion of percent-encoding concerns, including why unencoded `|` (`%7C`), `[` (`%5B`), and `]` (`%5D`) seem to work in some environments despite not being compliant.
 
 | [`style`](#style-values) | `explode` | `undefined` | `string` | `array` | `object` |