Pin Matplotlib everywhere
In python/doc#2, we found that Matplotlib 2.0 behaves weird with LaTeX output. As this is only one of many subtleties w.r.t. Matplotlib 2.0, pin it to 1.5.3 everywhere for now.
In python/doc#2, we found that Matplotlib 2.0 behaves weird with LaTeX output. As this is only one of many subtleties w.r.t. Matplotlib 2.0, pin it to 1.5.3 everywhere for now.