BUG: ZeroDivisionError in scipy.sparse.linalg.lsqr
Minor addition to docstrig about return parameters
Merge pull request #4144 from bsipocz/docs_optimize_brute_minor_addition

DOC: Minor addition to docstrig about return parameters
Merge pull request #4142 from ogrisel/fix-sparse-lsqr

BUG: ZeroDivisionError in `scipy.sparse.linalg.lsqr`
Merge remote-tracking branch 'upstream/master' into chi2-documentation-fix