SpringBoot Update reference documentation to reflect @SpringBootApplication's use of @SpringBootConfiguration

Comment From: snicoll

Thanks for the PR but I think the use of @Configuration here is deliberate as we may not want to get into the details of what @SpringBootConfiguration does compared to the regular @Configuration. I've flagged for team attention to get more feedback.

Comment From: wilkinsona

To me, the current documentation reads as if you could replace @SpringBootApplication with @EnableAutoConfiguration, @ComponentScan, and @Configuration and get the same behaviour. That's not the case as using @Configuration rather than @SpringBootConfiguration may break some of your tests. With this in mind, I think the proposed changes are an improvement. We could perhaps go a small step further and cross-link to the testing section that discusses @SpringBootConfiguration.

Comment From: snicoll

Thanks for the feedback. I've re-read the section and we're already mentioning quite advanced details about @ComponentScan. That nullifies my previous argument.

Comment From: wilkinsona

Thanks very much, @quaff.