question about license for patch

diff --git a/doc/todo/Bestdir_along_with_bestlink_in_IkiWiki.pm/discussion.mdwn b/doc/todo/Bestdir_along_with_bestlink_in_IkiWiki.pm/discussion.mdwn
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+- Is there some implicit license for patches posted on the wiki?
+  I would like to maybe use this in [[todo/mbox]]  --[[DavidBremner]]