DOC: Corrections in Datetime Units-arrays.datetime.rst
DOC: Corrections in Datetime Units-arrays.datetime.rst

Changed/corrected Time span - relative and absolute - for second, millisecond and microsecond. 

There were slight differences and was noted duly in the issue. See #6711 (https://github.com/numpy/numpy/issues/6711)
ddasilva/numpy,ddasilva/numpy,numpy/numpy,chatcannon/numpy,grlee77/numpy,chatcannon/numpy,grlee77/numpy,mattip/numpy,MSeifert04/numpy,shoyer/numpy,stuarteberg/numpy,Eric89GXL/numpy,shoyer/numpy,tacaswell/numpy,simongibbons/numpy,MSeifert04/numpy,madphysicist/numpy,bertrand-l/numpy,grlee77/numpy,madphysicist/numpy,seberg/numpy,WarrenWeckesser/numpy,simongibbons/numpy,charris/numpy,kiwifb/numpy,abalkin/numpy,maniteja123/numpy,madphysicist/numpy,maniteja123/numpy,WarrenWeckesser/numpy,ssanderson/numpy,simongibbons/numpy,shoyer/numpy,skwbc/numpy,mattip/numpy,gmcastil/numpy,tynn/numpy,pizzathief/numpy,pbrod/numpy,numpy/numpy,b-carter/numpy,madphysicist/numpy,dwillmer/numpy,MSeifert04/numpy,mhvk/numpy,pdebuyl/numpy,endolith/numpy,seberg/numpy,bertrand-l/numpy,charris/numpy,jakirkham/numpy,dwillmer/numpy,bringingheavendown/numpy,jorisvandenbossche/numpy,anntzer/numpy,skwbc/numpy,madphysicist/numpy,mattip/numpy,pdebuyl/numpy,ahaldane/numpy,jorisvandenbossche/numpy,gmcastil/numpy,simongibbons/numpy,seberg/numpy,stuarteberg/numpy,anntzer/numpy,abalkin/numpy,gfyoung/numpy,MSeifert04/numpy,chatcannon/numpy,mattip/numpy,ahaldane/numpy,shoyer/numpy,solarjoe/numpy,seberg/numpy,WarrenWeckesser/numpy,pdebuyl/numpy,SiccarPoint/numpy,rgommers/numpy,njase/numpy,rgommers/numpy,tacaswell/numpy,ContinuumIO/numpy,WarrenWeckesser/numpy,gfyoung/numpy,anntzer/numpy,Eric89GXL/numpy,Eric89GXL/numpy,Eric89GXL/numpy,behzadnouri/numpy,AustereCuriosity/numpy,MSeifert04/numpy,bringingheavendown/numpy,AustereCuriosity/numpy,rgommers/numpy,ahaldane/numpy,kiwifb/numpy,pizzathief/numpy,numpy/numpy,stuarteberg/numpy,endolith/numpy,grlee77/numpy,gmcastil/numpy,jakirkham/numpy,utke1/numpy,tacaswell/numpy,jakirkham/numpy,njase/numpy,solarjoe/numpy,ssanderson/numpy,ahaldane/numpy,abalkin/numpy,jorisvandenbossche/numpy,kiwifb/numpy,grlee77/numpy,jakirkham/numpy,behzadnouri/numpy,anntzer/numpy,mhvk/numpy,pbrod/numpy,gfyoung/numpy,AustereCuriosity/numpy,ahaldane/numpy,dwillmer/numpy,shoyer/numpy,utke1/numpy,ContinuumIO/numpy,tynn/numpy,jakirkham/numpy,jorisvandenbossche/numpy,ddasilva/numpy,SiccarPoint/numpy,SiccarPoint/numpy,tynn/numpy,bertrand-l/numpy,charris/numpy,mhvk/numpy,rgommers/numpy,dwillmer/numpy,pizzathief/numpy,pbrod/numpy,pizzathief/numpy,pbrod/numpy,behzadnouri/numpy,WarrenWeckesser/numpy,SiccarPoint/numpy,numpy/numpy,mhvk/numpy,b-carter/numpy,solarjoe/numpy,ContinuumIO/numpy,pdebuyl/numpy,endolith/numpy,b-carter/numpy,pbrod/numpy,mhvk/numpy,bringingheavendown/numpy,maniteja123/numpy,utke1/numpy,stuarteberg/numpy,ssanderson/numpy,njase/numpy,endolith/numpy,charris/numpy,simongibbons/numpy,pizzathief/numpy,jorisvandenbossche/numpy,skwbc/numpy