Modify test_correct_pip_version to allow for .pre/.post.
Modify test_correct_pip_version to allow for .pre/.post.

jythontools/pip,mujiansu/pip,yati-sagade/pip,zorosteven/pip,alquerci/pip,qbdsoft/pip,tdsmith/pip,luzfcb/pip,mujiansu/pip,radiosilence/pip,supriyantomaftuh/pip,mindw/pip,supriyantomaftuh/pip,jasonkying/pip,willingc/pip,James-Firth/pip,h4ck3rm1k3/pip,habnabit/pip,nthall/pip,zenlambda/pip,atdaemon/pip,erikrose/pip,xavfernandez/pip,h4ck3rm1k3/pip,dstufft/pip,James-Firth/pip,benesch/pip,pypa/pip,rouge8/pip,yati-sagade/pip,sbidoul/pip,haridsv/pip,ncoghlan/pip,atdaemon/pip,techtonik/pip,xavfernandez/pip,dstufft/pip,haridsv/pip,pradyunsg/pip,rbtcollins/pip,Ivoz/pip,luzfcb/pip,ncoghlan/pip,mindw/pip,caosmo/pip,qbdsoft/pip,qwcode/pip,squidsoup/pip,supriyantomaftuh/pip,msabramo/pip,jamezpolley/pip,harrisonfeng/pip,zorosteven/pip,caosmo/pip,davidovich/pip,sigmavirus24/pip,alex/pip,graingert/pip,RonnyPfannschmidt/pip,minrk/pip,willingc/pip,domenkozar/pip,qbdsoft/pip,h4ck3rm1k3/pip,patricklaw/pip,pjdelport/pip,zenlambda/pip,pfmoore/pip,jmagnusson/pip,techtonik/pip,erikrose/pip,alex/pip,jmagnusson/pip,RonnyPfannschmidt/pip,ncoghlan/pip,prasaianooz/pip,wkeyword/pip,fiber-space/pip,blarghmatey/pip,wkeyword/pip,Carreau/pip,patricklaw/pip,mattrobenolt/pip,sigmavirus24/pip,pjdelport/pip,jasonkying/pip,qwcode/pip,yati-sagade/pip,atdaemon/pip,sigmavirus24/pip,chaoallsome/pip,Gabriel439/pip,mindw/pip,mujiansu/pip,jamezpolley/pip,mattrobenolt/pip,chaoallsome/pip,nthall/pip,alex/pip,graingert/pip,ChristopherHogan/pip,prasaianooz/pip,chaoallsome/pip,wkeyword/pip,caosmo/pip,Gabriel439/pip,willingc/pip,pypa/pip,msabramo/pip,pradyunsg/pip,minrk/pip,KarelJakubec/pip,Gabriel439/pip,squidsoup/pip,sbidoul/pip,haridsv/pip,KarelJakubec/pip,benesch/pip,RonnyPfannschmidt/pip,tdsmith/pip,jamezpolley/pip,KarelJakubec/pip,dstufft/pip,James-Firth/pip,luzfcb/pip,habnabit/pip,benesch/pip,rouge8/pip,prasaianooz/pip,jythontools/pip,cjerdonek/pip,blarghmatey/pip,esc/pip,rouge8/pip,zvezdan/pip,ianw/pip,cjerdonek/pip,zvezdan/pip,davidovich/pip,jasonkying/pip,alquerci/pip,fiber-space/pip,esc/pip,jmagnusson/pip,zenlambda/pip,natefoo/pip,erikrose/pip,graingert/pip,nthall/pip,Carreau/pip,pjdelport/pip,ChristopherHogan/pip,ianw/pip,natefoo/pip,squidsoup/pip,zorosteven/pip,Ivoz/pip,fiber-space/pip,natefoo/pip,esc/pip,ChristopherHogan/pip,xavfernandez/pip,rbtcollins/pip,jythontools/pip,harrisonfeng/pip,blarghmatey/pip,rbtcollins/pip,pfmoore/pip,zvezdan/pip,techtonik/pip,habnabit/pip,davidovich/pip,tdsmith/pip,harrisonfeng/pip