We are in an early stage of the official Isabelle2021 release process.
The blog https://isabelle-dev.sketis.net/phame/blog/view/2 and the workboard
https://isabelle-dev.sketis.net/project/board/4 provide a clue where we are.
Presently, the repository is still open for commits for that branch, at least
until the end of the Christmas season (10-Jan-2021).
Makarius
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