Title: Extract dummy/2 from gcd.
Goal: accept
Parameters: [{file,"ef5.erl"},{posrange,{103,208}},{name,"dummy"}].
Documentation: Similar to ef1, but this time the name of the new function is the same, as the name of another function defined in the same module. Similarly to ef4, in this case this is not a problem, because the two functions have different arities, therefore they do not conflict. However,  a warning should be given to he user, because this transformation might  cause unintended overloading.
