MAINT: special: Fix whitespace in cephes/pdtr.c
ENH: special: pdtr and pdtrc give the correct limiting value when m=0.
ENH: special: Return 0 for sufficiently small lambda in pdtrik.
MAINT: silence a print in l-bfgs-b
Merge pull request #3337 from ev-br/lbfgsb_print

MAINT: optimize: silence a print in l-bfgs-b
Merge pull request #3155 from WarrenWeckesser/special-poisson-edge-cases

BUG: special: handle the edge case lambda=0 in pdtr, pdtrc and pdtrik
DOC: add 'Methods' section to Cython-based interpolation classes
Merge pull request #3355 from andreas-h/interpdoc

DOC: interpolate: add 'Methods' section to interpolation classes
ENH: implement Akima interpolation in 1D
simplify slicing/broadcasting
MAINT: interpolate: move Akima to _monotone.py and rename
Merge pull request #3355 from andreas-h/Akima1D

ENH: interpolate: implement Akima interpolation in 1D
BUG: interpolate: add missing import in _monotone
MAINT: rename AkimaInterpolator to Akima1DInterpolator
Merge pull request #3358 from andreas-h/akima_rename

MAINT: interpolate: rename AkimaInterpolator to Akima1DInterpolator
MAINT: optimize: reorganize the list of optimization routines
Merge pull request #3359 from pasky/optimize-reference

DOC: optimize: reorganize the list of optimization routines