math/big: add test cases for min/max exponent values
math/big: add test cases for min/max exponent values

Change-Id: I2e74e39628285e2fecaab712be6cff230619a6c2
Reviewed-on: https://go-review.googlesource.com/14778
Reviewed-by: Alan Donovan <7069e9552f9d110b0a0f326b96f22f63fb99dfc1@google.com>

malvira/go,kim-racktop/go,goodlang/good,beealone/go,roth1002/go,Jordanzuo/go,theif519/go,suncycheng/go,xiuzhifu/go,roth1002/go,GeorgiCodes/go,Cofyc/go,vsekhar/elastic-go,beealone/go,fjballest/golang,jacobhaven/go,NunoEdgarGub1/go,binarycrusader/go,mwhudson/go,goodlang/good,derekmarcotte/go,alex-zhang/go,theif519/go,vanloswang/go,GeorgiCodes/go,beealone/go,binarycrusader/go,Samurais/go,gdey/go,mwhudson/go,jonasi/go,mwhudson/go,xiuzhifu/go,GeorgiCodes/go,Endika/go,roth1002/go,cloudflare/go,cyberroadie/go,gdey/go,jacobhaven/go,4ad/go,polyverse-security/go,binarycrusader/go,derekmarcotte/go,deft-code/go,josharian/go,rachtsingh/gogojuice,theif519/go,momchil-velikov/go,Endika/go,christopher-henderson/Go,vsekhar/elastic-go,b54898533/go,kim-racktop/go,deft-code/go,momchil-velikov/go,b54898533/go,likesea/go,jacobhaven/go,mwhudson/go,sndnvaps/go,codestation/go,fjballest/golang,jdhenke/go,vanloswang/go,jacobhaven/go,deft-code/go,odeke-em/go,yasarkunduz/go,vsekhar/elastic-go,nawawi/go,dterei/go,Samurais/go,Endika/go,xiuzhifu/go,momchil-velikov/go,Cofyc/go,GeorgiCodes/go,CAFxX/go,malvira/go,NunoEdgarGub1/go,joshsammut/go,alex-zhang/go,theif519/go,theif519/go,beealone/go,fjballest/golang,cloudflare/go,gdey/go,vsekhar/elastic-go,jacobsa/go,rachtsingh/gogojuice,odeke-em/go,suncycheng/go,snowsnail/go,xiuzhifu/go,derekmarcotte/go,cloudflare/go,Endika/go,nawawi/go,odeke-em/go,sndnvaps/go,b54898533/go,samanalysis/go,alex-zhang/go,alex-zhang/go,Samurais/go,b54898533/go,miolini/go,b54898533/go,samanalysis/go,joshsammut/go,joshsammut/go,Jordanzuo/go,ganboing/go-esx,b54898533/go,cloudflare/go,derekmarcotte/go,beealone/go,snowsnail/go,Jordanzuo/go,jdhenke/go,vsekhar/elastic-go,kim-racktop/go,josharian/go,odeke-em/go,odeke-em/go,odeke-em/go,codestation/go,NunoEdgarGub1/go,codestation/go,jdhenke/go,roth1002/go,theif519/go,odeke-em/go,miolini/go,momchil-velikov/go,golang/go,mwhudson/go,jonasi/go,rachtsingh/gogojuice,likesea/go,josharian/go,Endika/go,4ad/go,Cofyc/go,deft-code/go,goodlang/good,dterei/go,linux-on-ibm-z/go,linux-on-ibm-z/go,gdey/go,joshsammut/go,CAFxX/go,jonasi/go,alex-zhang/go,Cofyc/go,yasarkunduz/go,CAFxX/go,miolini/go,fjballest/golang,nawawi/go,cyberroadie/go,ganboing/go-esx,codestation/go,Jordanzuo/go,cloudflare/go,yasarkunduz/go,polyverse-security/go,alex-zhang/go,josharian/go,4ad/go,jacobsa/go,golang/go,linux-on-ibm-z/go,sndnvaps/go,rachtsingh/gogojuice,Endika/go,malvira/go,malvira/go,jonasi/go,linux-on-ibm-z/go,binarycrusader/go,golang/go,jacobsa/go,4ad/go,Cofyc/go,dterei/go,joshsammut/go,deft-code/go,akutz/go,Jordanzuo/go,gdey/go,dterei/go,polyverse-security/go,mwhudson/go,rachtsingh/gogojuice,CAFxX/go,beealone/go,akutz/go,codestation/go,vanloswang/go,Cofyc/go,cloudflare/go,suncycheng/go,golang/go,vanloswang/go,suncycheng/go,linux-on-ibm-z/go,jdhenke/go,GeorgiCodes/go,golang/go,golang/go,Jordanzuo/go,derekmarcotte/go,jacobsa/go,josharian/go,NunoEdgarGub1/go,sndnvaps/go,jacobhaven/go,ImJasonH/go,ganboing/go-esx,kim-racktop/go,ImJasonH/go,cyberroadie/go,cyberroadie/go,yasarkunduz/go,kim-racktop/go,yasarkunduz/go,ganboing/go-esx,jacobsa/go,ImJasonH/go,linux-on-ibm-z/go,4ad/go,momchil-velikov/go,polyverse-security/go,nawawi/go,CAFxX/go,odeke-em/go,binarycrusader/go,jacobhaven/go,akutz/go,xiuzhifu/go,samanalysis/go,roth1002/go,NunoEdgarGub1/go,samanalysis/go,goodlang/good,malvira/go,jdhenke/go,malvira/go,vsekhar/elastic-go,cyberroadie/go,samanalysis/go,nawawi/go,Samurais/go,deft-code/go,golang/go,kim-racktop/go,b54898533/go,rachtsingh/gogojuice,ImJasonH/go,beealone/go,deft-code/go,vanloswang/go,CAFxX/go,theif519/go,josharian/go,jacobhaven/go,momchil-velikov/go,sndnvaps/go,vsekhar/elastic-go,polyverse-security/go,nawawi/go,malvira/go,jonasi/go,derekmarcotte/go,mwhudson/go,nawawi/go,theif519/go,Jordanzuo/go,Cofyc/go,yasarkunduz/go,vanloswang/go,kim-racktop/go,ganboing/go-esx,nawawi/go,cyberroadie/go,snowsnail/go,fjballest/golang,ganboing/go-esx,miolini/go,Samurais/go,vanloswang/go,likesea/go,alex-zhang/go,codestation/go,ImJasonH/go,ImJasonH/go,samanalysis/go,malvira/go,CAFxX/go,ganboing/go-esx,codestation/go,snowsnail/go,jonasi/go,binarycrusader/go,Cofyc/go,linux-on-ibm-z/go,likesea/go,jdhenke/go,polyverse-security/go,miolini/go,b54898533/go,derekmarcotte/go,likesea/go,sndnvaps/go,Samurais/go,snowsnail/go,polyverse-security/go,4ad/go,roth1002/go,yasarkunduz/go,jacobsa/go,alex-zhang/go,jacobhaven/go,polyverse-security/go,snowsnail/go,ImJasonH/go,binarycrusader/go,snowsnail/go,suncycheng/go,jacobsa/go,cloudflare/go,goodlang/good,GeorgiCodes/go,goodlang/good,codestation/go,momchil-velikov/go,samanalysis/go,CAFxX/go,NunoEdgarGub1/go,suncycheng/go,akutz/go,jonasi/go,cloudflare/go,cyberroadie/go,NunoEdgarGub1/go,fjballest/golang,gdey/go,Endika/go,jdhenke/go,likesea/go,xiuzhifu/go,miolini/go,joshsammut/go,Samurais/go,jacobsa/go,sndnvaps/go,rachtsingh/gogojuice,Jordanzuo/go,vanloswang/go,xiuzhifu/go,akutz/go,4ad/go,mwhudson/go,GeorgiCodes/go,miolini/go,ImJasonH/go,josharian/go,rachtsingh/gogojuice,akutz/go,vsekhar/elastic-go,sndnvaps/go,4ad/go,fjballest/golang,gdey/go,momchil-velikov/go,samanalysis/go,derekmarcotte/go,deft-code/go,Endika/go,binarycrusader/go,josharian/go,xiuzhifu/go,gdey/go,akutz/go,golang/go,beealone/go,linux-on-ibm-z/go,joshsammut/go,dterei/go,suncycheng/go,GeorgiCodes/go,roth1002/go,dterei/go,goodlang/good,joshsammut/go,dterei/go,jonasi/go,goodlang/good,snowsnail/go,akutz/go,cyberroadie/go,yasarkunduz/go,kim-racktop/go,NunoEdgarGub1/go,fjballest/golang,dterei/go,likesea/go,likesea/go,suncycheng/go,miolini/go,jdhenke/go,roth1002/go,Samurais/go,ganboing/go-esx