message: fixed arguments for Pc class
diff: @@ -348,7 +348,7 @@ cdef class Mat:
  # Create a generic preconditioner class
  cdef class Pc:
  - def __cinit__(self, *args, Mat mat=None, **kwargs):
  + def __cinit__(self, Mat mat=None, *args, **kwargs):
  '''
  This creates a default preconditioner depending on the matrix
  type.
  