After the changes from PR #2948, the regex was too eager to match any
substring contain "SK", such as in "MASK". Fix by requiring word
separation around it, as was already the case with the "CZ" token.
Originally called project metis, this feature allows you to do a lot of cool stuff, such as upgrading to a x265 encode, downloading releases with multiple languages, etc. Check out the wiki page at: https://github.com/Radarr/Radarr/wiki/Custom-Formats to learn more! Note: This feature is currently in "beta" and will get more tags and features in the future. Please let me know, if you have any issues and I hope this will allow for a lot of customization!