Fix for returndatasize (#1612)
Fix for returndatasize (#1612)

* Passing unittests

* CC

* blkn

* Improve trruffle test

* Improve trruffle test

* Fix detector test

* blkn

* Fix returndatasize

* Complete fix returndatasize/returndatacopy

* Update evm.py

lint

* Slice the important part

* move repeated code to a private method

* typo

trailofbits/manticore,trailofbits/manticore,trailofbits/manticore