sympy/sympy — pull request #1549 by zanzibar7 (2012-09-29 18:48:36+00:00)
Title: Fix comment in ...variation_of_parameters function

This is a small but important change in the documentation of
ode_nth_linear_constant_coeff_variation_of_parameters(eq, func, order, match):
in ode.py that I just found.