- :class:`linear_model.LinearRegression` now sets the `cond` parameter when
  calling the `scipy.linalg.lstsq` solver on dense input data. This ensures
  more numerically robust results on rank-deficient data. In particular, it
  empirically fixes the expected equivalence property between fitting with
  reweighted or with repeated data points.
  By :user:`Antoine Baker <antoinebaker>`
