Properly serialise output of endpoint command

spring-boot-starters/spring-boot-starter-shell/src/main/resources/commands/crash/endpoint.groovy

 package commands
 
-import org.springframework.boot.actuate.endpoint.Endpoint;
+import org.springframework.boot.actuate.endpoint.Endpoint
+import org.springframework.boot.actuate.endpoint.jmx.*
 
 @Usage("Invoke actuator endpoints")
 class endpoint {
@@ -23,7 +24,15 @@ class endpoint {
 
 		context.attributes['spring.beanfactory'].getBeansOfType(Endpoint.class).each { n, endpoint ->
 			if (n.equals(name) && endpoint.isEnabled()) {
-				out.println endpoint.invoke()
+
+				EndpointMBean mbean = context.attributes['spring.beanfactory'].getBean(EndpointMBeanExporter.class).getEndpointMBean(name, endpoint)
+				if (mbean instanceof DataEndpointMBean) {
+					out.println mbean.getData()
+				}
+				else {
+					out.println mbean.invoke()
+				}
+
 			}
 		}
 		""