sympy/sympy — pull request #1174 by jrioux (2012-03-26 15:32:21+00:00)
Title: Latex printing issues

Fix the latex printing for Piecewise (http://code.google.com/p/sympy/issues/detail?id=2101).
Clarify the docstring for latex printing of matrices (http://code.google.com/p/sympy/issues/detail?id=2894).
Implement latex printing for set and frozenset (http://code.google.com/p/sympy/issues/detail?id=3062).
Fix the latex printing of Not (http://code.google.com/p/sympy/issues/detail?id=3165).