Fn handling refactorings.
Fix minor indent.
Undo unneccessary abstraction.
Fix function name mistake
Restore line numbers after macroexpanding letfn
Rename `wrap-fn-expression` -> `wrap-fn-body`
Produce output mistakes in sample.clj
Merge pull request #20 from JacekLach/fn-refactorings

Fn handling refactorings.