Polish formatting in Actuator API documentation

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/AbstractEndpointDocumentationTests.java

@@ -61,9 +61,9 @@ public class AbstractEndpointDocumentationTests {
 
 	protected String describeEnumValues(Class<? extends Enum<?>> enumType) {
 		return StringUtils
-				.collectionToCommaDelimitedString(Stream.of(enumType.getEnumConstants())
+				.collectionToDelimitedString(Stream.of(enumType.getEnumConstants())
 						.map((constant) -> "`" + constant.name() + "`")
-						.collect(Collectors.toList()));
+						.collect(Collectors.toList()), ", ");
 	}
 
 	protected OperationPreprocessor limit(String... keys) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/resources/org/springframework/restdocs/templates/asciidoctor/response-fields.snippet

+|===
+|Path|Type|Description
+
+{{#fields}}
+|{{#tableCellContent}}`+{{path}}+`{{/tableCellContent}}
+|{{#tableCellContent}}`{{type}}`{{/tableCellContent}}
+|{{#tableCellContent}}{{description}}{{/tableCellContent}}
+
+{{/fields}}
+|===