Fix example for folly::format
Fix example for folly::format

Summary: That's all.

Test Plan: .

Reviewed By: tjackson@fb.com

FB internal diff: D618824

cppfool/folly,constantine001/folly,loversInJapan/folly,Hincoin/folly,Orvid/folly,ykarlsbrun/folly,bikong2/folly,tomhughes/folly,brunomorishita/folly,chjp2046/folly,fw1121/folly,kernelim/folly,leolujuyi/folly,xzmagic/folly,doctaweeks/folly,KSreeHarsha/folly,cole14/folly,juniway/folly,constantine001/folly,nickhen/folly,renyinew/folly,renyinew/folly,theiver9827/folly,facebook/folly,hongliangzhao/folly,raphaelamorim/folly,loversInJapan/folly,Orvid/folly,raphaelamorim/folly,cppfool/folly,romange/folly,bobegir/folly,juniway/folly,sakishum/folly,rklabs/folly,shaobz/folly,leolujuyi/folly,guker/folly,bsampath/folly,colemancda/folly,Hincoin/folly,arg0/folly,wildinto/folly,renyinew/folly,wildinto/folly,facebook/folly,stonegithubs/folly,tempbottle/folly,gavioto/folly,kernelim/folly,yangjin-unique/folly,yangjin-unique/folly,bobegir/folly,juniway/folly,SammyK/folly,upsoft/folly,upsoft/folly,bowlofstew/folly,raphaelamorim/folly,sonnyhu/folly,bsampath/folly,rklabs/folly,floxard/folly,renyinew/folly,project-zerus/folly,unmeshvrije/C--,alexst07/folly,loverszhaokai/folly,xzmagic/folly,stonegithubs/folly,lifei/folly,facebook/folly,chjp2046/folly,xzmagic/folly,upsoft/folly,gavioto/folly,SeanRBurton/folly,mqeizi/folly,floxard/folly,brunomorishita/folly,tomhughes/folly,hongliangzhao/folly,clearlylin/folly,facebook/folly,SammyK/folly,upsoft/folly,shaobz/folly,bobegir/folly,SeanRBurton/folly,bikong2/folly,xzmagic/folly,ykarlsbrun/folly,guker/folly,gaoyingie/folly,xzmagic/folly,cole14/folly,facebook/folly,gavioto/folly,loversInJapan/folly,reddit/folly,arg0/folly,tempbottle/folly,tomhughes/folly,CJstar/folly,sonnyhu/folly,KSreeHarsha/folly,SammyK/folly,reddit/folly,clearlinux/folly,Eagle-X/folly,wildinto/folly,bsampath/folly,shaobz/folly,charsyam/folly,constantine001/folly,brunomorishita/folly,project-zerus/folly,romange/folly,charsyam/folly,cole14/folly,wildinto/folly,brunomorishita/folly,alexst07/folly,tempbottle/folly,lifei/folly,tomhughes/folly,PoisonBOx/folly,guker/folly,KSreeHarsha/folly,Hincoin/folly,kernelim/folly,colemancda/folly,ykarlsbrun/folly,bobegir/folly,sakishum/folly,project-zerus/folly,rklabs/folly,rklabs/folly,rklabs/folly,clearlylin/folly,doctaweeks/folly,Eagle-X/folly,romange/folly,mqeizi/folly,theiver9827/folly,arg0/folly,doctaweeks/folly,CJstar/folly,PPC64/folly,nickhen/folly,alexst07/folly,chjp2046/folly,stonegithubs/folly,clearlinux/folly,sonnyhu/folly,mqeizi/folly,CJstar/folly,PoisonBOx/folly,guker/folly,nickhen/folly,arg0/folly,fw1121/folly,fw1121/folly,PoisonBOx/folly,stonegithubs/folly,PPC64/folly,loversInJapan/folly,CJstar/folly,shaobz/folly,brunomorishita/folly,theiver9827/folly,cppfool/folly,Eagle-X/folly,gavioto/folly,upsoft/folly,lifei/folly,renyinew/folly,romange/folly,loversInJapan/folly,chjp2046/folly,unmeshvrije/C--,ykarlsbrun/folly,kernelim/folly,unmeshvrije/C--,bikong2/folly,gavioto/folly,gaoyingie/folly,wildinto/folly,cppfool/folly,sonnyhu/folly,nickhen/folly,fw1121/folly,gaoyingie/folly,tempbottle/folly,nickhen/folly,alexst07/folly,Hincoin/folly,SeanRBurton/folly,bowlofstew/folly,lifei/folly,sonnyhu/folly,juniway/folly,loverszhaokai/folly,PoisonBOx/folly,mqeizi/folly,chjp2046/folly,zhiweicai/folly,floxard/folly,charsyam/folly,tomhughes/folly,juniway/folly,SammyK/folly,leolujuyi/folly,bowlofstew/folly,yangjin-unique/folly,hongliangzhao/folly,theiver9827/folly,zhiweicai/folly,KSreeHarsha/folly,gaoyingie/folly,theiver9827/folly,unmeshvrije/C--,guker/folly,bowlofstew/folly,cppfool/folly,colemancda/folly,loverszhaokai/folly,romange/folly,doctaweeks/folly,constantine001/folly,yangjin-unique/folly,clearlylin/folly,yangjin-unique/folly,hongliangzhao/folly,doctaweeks/folly,project-zerus/folly,Orvid/folly,zhiweicai/folly,clearlinux/folly,floxard/folly,colemancda/folly,Orvid/folly,bobegir/folly,SeanRBurton/folly,floxard/folly,ykarlsbrun/folly,reddit/folly,raphaelamorim/folly,mqeizi/folly,cole14/folly,Eagle-X/folly,alexst07/folly,hongliangzhao/folly,zhiweicai/folly,sakishum/folly,bsampath/folly,unmeshvrije/C--,PPC64/folly,PPC64/folly,raphaelamorim/folly,stonegithubs/folly,PPC64/folly,leolujuyi/folly,tempbottle/folly,Hincoin/folly,fw1121/folly,unmeshvrije/C--,zhiweicai/folly,cole14/folly,constantine001/folly,loverszhaokai/folly,arg0/folly,charsyam/folly,bowlofstew/folly,clearlinux/folly,sakishum/folly,reddit/folly,clearlylin/folly,leolujuyi/folly,PoisonBOx/folly,Orvid/folly,project-zerus/folly,bikong2/folly,reddit/folly,clearlylin/folly,SeanRBurton/folly,lifei/folly,colemancda/folly,sakishum/folly,kernelim/folly,gaoyingie/folly,shaobz/folly,SammyK/folly,bsampath/folly,clearlinux/folly,bikong2/folly,KSreeHarsha/folly,Eagle-X/folly,loverszhaokai/folly,CJstar/folly