e3e404f9f9
Since https://jira.spring.io/browse/SPR-16624, the contract for `ContentNegotiationStrategy` has been refined and should never return an empty list if it's got no preference for a media type, but it should rather respond with a `"*/*"` instead. This commit fixes the `OptionalPathExtensionContentNegotiationStrategy` defined in the Spring MVC auto-configuration to have that behavior. Fixes gh-12900