Small fixes in the docstring of fatiando.inversion
Small fixes in the docstring of fatiando.inversion

eusoubrasileiro/fatiando_seismic,drandykass/fatiando,eusoubrasileiro/fatiando,cmeessen/fatiando,victortxa/fatiando,rafaelmds/fatiando,mtb-za/fatiando,cmeessen/fatiando,fatiando/fatiando,eusoubrasileiro/fatiando_seismic,santis19/fatiando,mtb-za/fatiando,fatiando/fatiando,drandykass/fatiando,victortxa/fatiando,santis19/fatiando,eusoubrasileiro/fatiando,rafaelmds/fatiando,eusoubrasileiro/fatiando