def rubygems(ruby, version, runas=None):
 return _rvm_do(ruby, ['rubygems', version], runas=runas)

def rubygems ( ruby , version , runas = None ) : return _rvm_do ( ruby , [ 'rubygems' , version ] , runas = runas )
installs a specific rubygems version in the given ruby ruby the ruby for which to install rubygems version the version of rubygems to install .