matplotlib/matplotlib — pull request #1220 by efiring (2012-09-08 20:08:18+00:00)
Title: Figure.show: clarify docstring and error message

Figure.show is only for use with the pyplot figure management
framework. The error of trying to use it in a pure OO context,
with a directly-instantiated Figure instance, now generates an
error message explaining this. This closes #1219.