Fix VirtualEnvironment repr for Python2.6.
Fix VirtualEnvironment repr for Python2.6.

(cherry picked from commit b424e40d375851beea683f7dcdbe5134216a09b0)

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