Issue #2293105 by vijaycs85: MigrateActionConfigSchemaTest duplicates all its code from SchemaCheckTestTrait.
Issue #2291505 by joshi.rohit100: Fixed ParserInterface class contains FetcherInterface documentation.
Issue #2287063 by ParisLiakos, andypost: Fixed Remove remains of t() in watchdog messages.
Issue #2288185 by typhonius: Fixed Typos around the codebase for OPML.