Fix warning
docs
$HOME/.cabal is not a cabal file
Support where clauses, let bindings and case expressions in case splitting (fixes #395)
Don't use fromJust
Fix `findCabalFile`
Revert ""expand" specifies "-b"."

No idea what this was supposed to do, there's no mention of
any -b option anywhere that I can find.

This reverts commit f23b0db4df891b2481447c7828f184525f9aa435.
Merge branch 'master' into release
Bump version to 5.2.1.1