Fix typo in send_file docs
Fix typo in send_file docs

Signed-off-by: Armin Ronacher <51e1b983df8328b92ad653ca9129d9a11178303a@active-4.com>

anujk3/flask,fanshaohua-fan/flask,xujianhai/flask,postelin/flask,gangeshwark/flask,VShangxiao/flask,pxzhenren/flask,skmezanul/flask,GavinCruise/flask,bluedazzle/flask,wtl-zju/flask,tony/flask,mitsuhiko/flask,jorpramo/flask,Ricardo666666/flask,karen-wang/flask,artleaf/flask,q1ang/flask,beni55/flask,skmezanul/flask,RohithKP/flask,gaomingnudt/gm-flask2.0,visaxin/flask,raven47git/flask,artleaf/flask,auready/flask,jenalgit/flask,tripathi62674/flask,moluzhang/flask,onetinyr/flask,flamelizard/flask,postelin/flask,hyunchel/flask,nwags/flask,JamesTFarrington/flask,gbolahanalade/flask,adrianmoisey/cptdevops,nju520/flask,sage417/flask,nju520/flask,liukaijv/flask,lynget/flask,godfreyy/flask,ghhong1986/flask,fevxie/flask,erishforG/flask,jeezybrick/flask,kyle-sorensen/flask,mujiatong/flask,nju520/flask,chuijiaolianying/flask,MjAbuz/flask,kuku940/flask,gangeshwark/flask,RohithKP/flask,godfreyy/flask,XGiton/flask,raven47git/flask,xujianhai/flask,adrianmoisey/cptdevops,robertglen/flask,fevxie/flask,rollingstone/flask,oculardexterity/flask,AvivC/flask,wklken/flask,wangjun/flask,iamantee/flask,sgrepo/flask,pallets/flask,niima/flask,warm200/flask,HeyItsAlan/flask,tony/flask,GavinCruise/flask,warm200/flask,justanr/flask,niima/flask,jonieli/flask,tangfeng1/flask,ankurpandey/flask,ankurpandey/flask,drewja/flask,treedledee/flask,vishnugonela/flask,rawrgulmuffins/flask,pledo/flask,raven47git/flask,chuijiaolianying/flask,VictorChaun/flask,fkazimierczak/flask,gangeshwark/flask,edcomstock/flask,ezequielo/flask,bodefuwa/flask,dominjune/flask,godfreyy/flask,VictorChaun/flask,visaxin/flask,nZac/flask,elelianghh/flask,ZacariasBendeck/flask,hoatle/flask,cheesecake4392/flask,cgvarela/flask,dawran6/flask,fengsp/flask,mrdon/flask,ezequielo/flask,kuhli/flask,XGiton/flask,fkazimierczak/flask,liaoqingwei/flask,theo-l/flask,oculardexterity/flask,SsangYoon/Flask,EasonYi/flask,blankme/flask,justanr/flask,kyle-sorensen/flask,moluzhang/flask,TylerB24890/flask,erishforG/flask,VictorChaun/flask,grayswand1r/flask,bluedazzle/flask,vivekanand1101/flask,hyunchel/flask,liukaijv/flask,lalinsky/flask,wklken/flask,AvivC/flask,vishnugonela/flask,drewja/flask,WSDC-NITWarangal/flask,lyn233/flask,pallets/flask,lalinsky/flask,jonatanblue/flask,lynget/flask,jenalgit/flask,algoStruct/flask,s7v7nislands/flask,lyn233/flask,LonglyCode/flask,nZac/flask,aniketshukla/flask,jeezybrick/flask,tjxiter/flask,brianbeale/flask,LonglyCode/flask,Freebird2014/flask,iamantee/flask,zailushangde/flask,warm200/flask,szymonm/flask,ffsdmad/flask,jstacoder/flask,ABaldwinHunter/flask-clone-classic,mysweet/flask,pledo/flask,jenalgit/flask,cliu-aa/flask,JingZhou0404/flask,AndreaEdwards/flask,Endika/flask,kuhli/flask,jawed123/flask,flamelizard/flask,chenrenyi/flask,wtorcasoGB/flask,vivekanand1101/flask,grayswand1r/flask,drewja/flask,s7v7nislands/flask,horica-ionescu/flask,kuku940/flask,huwenhui/flask,jiimaho/flask,alanhamlett/flask,jonatanblue/flask,ankravch/flask,ryandvill/flask,mAzurkovic/flask,Papa2k15/flask,rollingstone/flask,abdulbaqi/flask,jorpramo/flask,sage417/flask,arvinls/flask,liuyi1112/flask,q1ang/flask,xiaoshaozi52/flask,ankravch/flask,liaoqingwei/flask,lord63-forks/flask,blankme/flask,mAzurkovic/flask,wtorcasoGB/flask,mitchfriedman/flask,justanr/flask,suppandi/flask,lord63-forks/flask,mysweet/flask,tripathi62674/flask,algoStruct/flask,karlw00t/flask,beni55/flask,antsar/flask,alanhamlett/flask,cliu-aa/flask,DesQi/flask,stephaniemertz/flask,luzzyzhang/flask,suppandi/flask,ankurpandey/flask,ZacariasBendeck/flask,margguo/flask,ffsdmad/flask,gbolahanalade/flask,jiimaho/flask,pinkpet/flask,tcnoviembre2013/flask,HeyItsAlan/flask,tcnoviembre2013/flask,arvinls/flask,ghhong1986/flask,horica-ionescu/flask,sixpi/flask,alexwidener/flask,artleaf/flask,luvten/flask,dhruvsrivastava/flask,anujk3/flask,SsangYoon/Flask,Faiz7412/flask,Ricardo666666/flask,wldtyp/flask,onetinyr/flask,bodefuwa/flask,qinfengsuiyu/flask,Papa2k15/flask,theo-l/flask,chenrenyi/flask,visaxin/flask,AndreaEdwards/flask,ryandvill/flask,wtl-zju/flask,VShangxiao/flask,happyspace/flask,wldtyp/flask,Endika/flask,rawrgulmuffins/flask,EasonYi/flask,treedledee/flask,sam-tsai/flask,karen-wang/flask,edcomstock/flask,postelin/flask,happyspace/flask,sonnyhu/flask,hoatle/flask,mitsuhiko/flask,s7v7nislands/flask,tangfeng1/flask,mitchfriedman/flask,wudafucode/flask,VShangxiao/flask,fkazimierczak/flask,liuyi1112/flask,homeworkprod/flask,qinfengsuiyu/flask,wilbert-abreu/flask,jonieli/flask,cheesecake4392/flask,alanhamlett/flask,Eagles2F/flask,ezequielo/flask,nwags/flask,Ricardo666666/flask,tangfeng1/flask,gaomingnudt/gm-flask2.0,wilbert-abreu/flask,brianbeale/flask,flabe81/flask,SsangYoon/Flask,luvten/flask,robertglen/flask,mrdon/flask,chenke91/flask,sixpi/flask,cgvarela/flask,DesQi/flask,zoyanhui/flask,huwenhui/flask,karen-wang/flask,happyspace/flask,wangjun/flask,anujk3/flask,tristanfisher/flask,flabe81/flask,zoyanhui/flask,JamesTFarrington/flask,jorpramo/flask,mrdon/flask,felipefuka/flask,liuyi1112/flask,Faiz7412/flask,EasonYi/flask,Faiz7412/flask,GavinCruise/flask,xiaoshaozi52/flask,wklken/flask,auready/flask,sonnyhu/flask,Parkayun/flask,antsar/flask,margguo/flask,liaoqingwei/flask,chenke91/flask,dhruvsrivastava/flask,jstacoder/flask,kyle-sorensen/flask,mrdon/flask,sgrepo/flask,MjAbuz/flask,algoStruct/flask,luzzyzhang/flask,karlw00t/flask,garaden/flask,fanshaohua-fan/flask,Eagles2F/flask,homeworkprod/flask,vishnugonela/flask,tristanfisher/flask,abdulbaqi/flask,pallets/flask,gilesburnfield/flask,pxzhenren/flask,zailushangde/flask,wudafucode/flask,felipefuka/flask,jawed123/flask,Parkayun/flask,WSDC-NITWarangal/flask,tjxiter/flask,TylerB24890/flask,Freebird2014/flask,oculardexterity/flask,ABaldwinHunter/flask-clone-classic,stephaniemertz/flask,gilesburnfield/flask,onetinyr/flask,dawran6/flask,sam-tsai/flask,pinkpet/flask,garaden/flask,mujiatong/flask,chuijiaolianying/flask,szymonm/flask,ryandvill/flask,dominjune/flask,aniketshukla/flask,szymonm/flask,alexwidener/flask,JingZhou0404/flask,jonieli/flask,elelianghh/flask,jstacoder/flask,fengsp/flask,suppandi/flask,TylerB24890/flask,chenke91/flask,AndreaEdwards/flask