sympy/sympy — pull request #1535 by smichr (2012-09-19 02:41:37+00:00)
Title: matrices: docstring edit of shape; add to tutorial re slicing

These modifications come out of the discussion about the apparent regression in how Matrix deals with indices that are out of range. The discussion arose in #1530 and http://code.google.com/p/sympy/issues/detail?id=3401