Updated letter value plot docs.
Updated letter value plot docs.
anntzer/seaborn,mwaskom/seaborn,arokem/seaborn,phobson/seaborn,mwaskom/seaborn,JWarmenhoven/seaborn,lukauskas/seaborn,arokem/seaborn,sauliusl/seaborn,olgabot/seaborn,petebachant/seaborn,oesteban/seaborn,phobson/seaborn,lukauskas/seaborn,jat255/seaborn,anntzer/seaborn,drewokane/seaborn