Fix factorplot docstring
Fix factorplot docstring

mwaskom/seaborn,anntzer/seaborn,arokem/seaborn,lukauskas/seaborn,petebachant/seaborn,lukauskas/seaborn,sauliusl/seaborn,mwaskom/seaborn,phobson/seaborn,arokem/seaborn,phobson/seaborn,anntzer/seaborn