Reconsider inclusion of org.thymeleaf in the logging black list

[danielfernandez]

Thymeleaf 3.0 does not log its configuration in INFO level anymore during initialization. DEBUG and TRACE are used now. This was one of the reasons logging of the org.thymeleaf package was blacklisted in #265.

It would be great if you could reconsider this blacklisting for Spring Boot 2.0.

Note that we do still output the ugly prefix :), and do multi-line logging during initialization. The idea is to keep our logs as parseable and machine-processable as possible. But anyway, INFO level should now be clean.

[philwebb]

See also #7450

[philwebb]

@danielfernandez Didn't mean to imply the logging was ugly, just that Spring Boot always shows INFO messages and then our startup message looks ugly. If it's at DEBUG now then that's great.

[danielfernandez]

@philwebb ah ok, understood. Anyway, to be honest the prefix isn't precisely pretty, it gets quite a bit in the way :). But I think it's useful to easily filter log entries by external processors/monitoring tools.

Thanks for reconsidering this!

[philwebb]

FWIW I think we just remap them in Boot 1.x. If you start the app with --debug you still get those log messages (although we might move them under org.springframework.boot).