ENH: Add docstrings and annotations to 2 misc private functions
ENH: Add docstrings and annotations to 2 misc private functions

simongibbons/numpy,rgommers/numpy,endolith/numpy,charris/numpy,jakirkham/numpy,rgommers/numpy,anntzer/numpy,seberg/numpy,mhvk/numpy,numpy/numpy,pdebuyl/numpy,anntzer/numpy,numpy/numpy,jakirkham/numpy,charris/numpy,mhvk/numpy,pdebuyl/numpy,charris/numpy,mattip/numpy,mhvk/numpy,simongibbons/numpy,numpy/numpy,simongibbons/numpy,rgommers/numpy,rgommers/numpy,jakirkham/numpy,endolith/numpy,simongibbons/numpy,jakirkham/numpy,mattip/numpy,anntzer/numpy,jakirkham/numpy,pdebuyl/numpy,mattip/numpy,charris/numpy,mhvk/numpy,mattip/numpy,seberg/numpy,endolith/numpy,endolith/numpy,pdebuyl/numpy,anntzer/numpy,simongibbons/numpy,seberg/numpy,numpy/numpy,mhvk/numpy,seberg/numpy