Got rid of cast in flatten, and added comments about flatten, flattenTrav, flatMapTrav method ideas.
Got rid of cast in flatten, and added comments about flatten, flattenTrav,
flatMapTrav method ideas.

triggerNZ/scalatest,matterche/scalatest,gcberger/scalatest,SRGOM/scalatest,rfries/scalatest,SRGOM/scalatest,janekdb/scalatest,rfries/scalatest,SRGOM/scalatest,triggerNZ/scalatest,triggerNZ/scalatest,triggerNZ/scalatest,matterche/scalatest,matterche/scalatest,rfries/scalatest,flicken/scalatest,gcberger/scalatest,janekdb/scalatest,flicken/scalatest,SRGOM/scalatest,janekdb/scalatest,rfries/scalatest,rahulkavale/scalatest,flicken/scalatest,flicken/scalatest,gcberger/scalatest,rahulkavale/scalatest,matterche/scalatest,janekdb/scalatest,rahulkavale/scalatest,gcberger/scalatest,rahulkavale/scalatest