TST: add test to check for correct version string format.
TST: add test to check for correct version string format.

Implements idea suggested in gh-6431.

pbrod/numpy,argriffing/numpy,jorisvandenbossche/numpy,charris/numpy,anntzer/numpy,dwillmer/numpy,abalkin/numpy,Eric89GXL/numpy,charris/numpy,solarjoe/numpy,mhvk/numpy,pizzathief/numpy,simongibbons/numpy,endolith/numpy,gfyoung/numpy,b-carter/numpy,jakirkham/numpy,pdebuyl/numpy,Dapid/numpy,b-carter/numpy,ddasilva/numpy,rgommers/numpy,ContinuumIO/numpy,behzadnouri/numpy,seberg/numpy,bringingheavendown/numpy,chatcannon/numpy,pdebuyl/numpy,WarrenWeckesser/numpy,stuarteberg/numpy,jakirkham/numpy,dwillmer/numpy,joferkington/numpy,SiccarPoint/numpy,stuarteberg/numpy,madphysicist/numpy,skwbc/numpy,grlee77/numpy,ssanderson/numpy,rherault-insa/numpy,ahaldane/numpy,anntzer/numpy,seberg/numpy,pizzathief/numpy,simongibbons/numpy,ContinuumIO/numpy,ahaldane/numpy,chiffa/numpy,ssanderson/numpy,chiffa/numpy,Eric89GXL/numpy,grlee77/numpy,WarrenWeckesser/numpy,maniteja123/numpy,tacaswell/numpy,kiwifb/numpy,b-carter/numpy,rgommers/numpy,tynn/numpy,MSeifert04/numpy,jonathanunderwood/numpy,madphysicist/numpy,pbrod/numpy,madphysicist/numpy,simongibbons/numpy,ESSS/numpy,pbrod/numpy,argriffing/numpy,gmcastil/numpy,shoyer/numpy,njase/numpy,grlee77/numpy,tacaswell/numpy,jorisvandenbossche/numpy,jonathanunderwood/numpy,WarrenWeckesser/numpy,jonathanunderwood/numpy,shoyer/numpy,Eric89GXL/numpy,stuarteberg/numpy,utke1/numpy,ddasilva/numpy,Dapid/numpy,abalkin/numpy,pbrod/numpy,numpy/numpy,anntzer/numpy,AustereCuriosity/numpy,joferkington/numpy,nbeaver/numpy,bringingheavendown/numpy,solarjoe/numpy,bertrand-l/numpy,rgommers/numpy,utke1/numpy,stuarteberg/numpy,kiwifb/numpy,seberg/numpy,anntzer/numpy,endolith/numpy,AustereCuriosity/numpy,SiccarPoint/numpy,grlee77/numpy,nbeaver/numpy,kiwifb/numpy,ahaldane/numpy,numpy/numpy,ahaldane/numpy,mhvk/numpy,WarrenWeckesser/numpy,skwbc/numpy,charris/numpy,pizzathief/numpy,jorisvandenbossche/numpy,tynn/numpy,bringingheavendown/numpy,drasmuss/numpy,rherault-insa/numpy,joferkington/numpy,njase/numpy,Dapid/numpy,ddasilva/numpy,SiccarPoint/numpy,pdebuyl/numpy,nbeaver/numpy,jorisvandenbossche/numpy,drasmuss/numpy,solarjoe/numpy,jorisvandenbossche/numpy,gfyoung/numpy,bertrand-l/numpy,ESSS/numpy,mattip/numpy,pizzathief/numpy,AustereCuriosity/numpy,pbrod/numpy,madphysicist/numpy,pizzathief/numpy,dwillmer/numpy,maniteja123/numpy,joferkington/numpy,mattip/numpy,MSeifert04/numpy,maniteja123/numpy,argriffing/numpy,mhvk/numpy,MSeifert04/numpy,grlee77/numpy,rgommers/numpy,WarrenWeckesser/numpy,charris/numpy,simongibbons/numpy,shoyer/numpy,mhvk/numpy,SiccarPoint/numpy,endolith/numpy,dwillmer/numpy,bertrand-l/numpy,seberg/numpy,utke1/numpy,endolith/numpy,mattip/numpy,shoyer/numpy,mattip/numpy,pdebuyl/numpy,drasmuss/numpy,skwbc/numpy,ssanderson/numpy,ahaldane/numpy,MSeifert04/numpy,chiffa/numpy,chatcannon/numpy,behzadnouri/numpy,behzadnouri/numpy,tacaswell/numpy,jakirkham/numpy,numpy/numpy,gfyoung/numpy,njase/numpy,simongibbons/numpy,jakirkham/numpy,numpy/numpy,mhvk/numpy,shoyer/numpy,jakirkham/numpy,ContinuumIO/numpy,madphysicist/numpy,tynn/numpy,abalkin/numpy,ESSS/numpy,chatcannon/numpy,gmcastil/numpy,MSeifert04/numpy,Eric89GXL/numpy,rherault-insa/numpy,gmcastil/numpy