Adding "--" to argment list may change the argument of the program started by mprof run. #388

Consider a program called test.py that may have an option -number -1. Command

mprof run python test.py -number -1

will pass -number -- -1 to test.py, i.e. test.py is started by

python test.py -number -- -1

It seems that the run action doesn't need -- to distinguish the parameters.