https://bugzilla.redhat.com/show_bug.cgi?id=1655461
--- Comment #34 from Sergio Basto sergio@serjux.com --- to complete the information: https://raymii.org/s/tutorials/Local_W3C_HTML5_Validator_Server.html https://about.validator.nu/#api https://validator.github.io/validator/#options and "Build instructions" chapter
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