implicit_rounds generates type error for PasswordHash.using
A documented flag seems to generate a TypeError TypeError: using() got an unexpected keyword argument 'implicit_rounds'
when used for at atleast the sha512_crypt.using and sha256_crypt.using methods.
I did note during my testing that it does seem to be documented as being internal... however it's listed as a parameter of using not an internal property of the class.
Playing around reveals that this is not a valid parameter to using and probably should not be documented under the using() params list. Additionally it appears that implicit_rounds defaults to always be implicit when using(rounds=5000). Since setting sha512_crypt.implicit_rounds=False and then calling sha512_crypt.using(rounds=5000).hash("test") does not seem to generate a hash string with a rounds section. I do not think that this parameter should be listed as a parameter at all, and instead a section about the behavior of rounds=5000 should be highlighted under the rounds parameter.