MAINT : Returning a warning for low attenuation values of chebwin window
MAINT : Adding reason in the warning message of chebwin window
DOC: fix docstring for gh-3469
Merge pull request #3462 from ankit-maverick/chebwin

MAINT : Returning a warning for low attenuation values of chebwin window
Merge pull request #3473 from perimosocordiae/patch-3

DOC: improve ndimage.find_objects docstring
FIX: restore np.abs ufunc support for scipy.sparse
STY: sparse: rewrite call to abs in __numpy_ufunc__ in a different way
Merge pull request #3470 from pr-3470

BUG: sparse: restore np.abs ufunc support for scipy.sparse
BUG: sparse/_csparsetools: cast integer indices to same dtype
MAINT: require Tempita, and fix cythonize treatment of .pyx.in files
BUG: sparse: rewrite _csparsetools using Tempita rather than fused types

As of Cython 0.20.1, the fused types dispatch mechanism does not seem
solid enough, so we fall back here to a simpler solution.