LikePages+ is a search feature of WardsWiki+, which scans for
WikiPages+ whose name is somewhat similar to the one of the current
page (the pagename must be made up of the same WikiWordParts+ so a
page gets listed).
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You cannot modify the README.plugins file, but anyhow any ideas or suggestion should as usually get filed on BugReports, UserSuggestions or even better the README.plugins.Discussion.