Suggested command for AST_Diff tool does not work

[mojtaba-eshghie]

Hi,

Your suggested tool for AST_Diff in its README.md file is:

sif -v TypeOfFault -a contract_name.ast -j contract_name.json -b contract_name2.ast -k contract_name2.json

However, it seems that -b and -k options are not really available.