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Prior to Spring Framework 5.1.3, MimeTypeUtils.parseMimeTypes() and MediaType.parseMediaTypes() ignored empty entries, but 5.1.3 introduced a regression in that an empty entry -- for example, due to a trailing comma in the list of media types in an HTTP Accept header -- would result in a "406 Not Acceptable" response status. This commit fixes this by filtering out empty entries before parsing them into MimeType and MediaType instances. Empty entries are therefore effectively ignored. Fixes gh-23241