HyperLedger Fabric from IBM is fork of Tangle or Etherium?
No, they are not related at all. The Hyperledger documentation is not short. The Hyperledger Github project does not mention Tangle as far as I can see. The only similarity with the Hyperledger documentation and Etherium documentation is that they are hosted on Read the Docs and look similar, the content is completely different. Hyperledger, Tangle, and Etherium are developed completely independently.