[run_arity] safe_run(), only pass options to run() if it accepts them
Merge pull request #4 from portertech/feature/run_arity

safe_run(), only pass options to run() if it accepts them
[run_arity] use absolute value of arity
Merge pull request #5 from portertech/feature/run_arity

safe_run(), use absolute value of run() arity
patch level bump, absolute run() arity