Tutorial prose tweaks
Tutorial prose tweaks

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