Fix typos in shell.rst
Fix typos in shell.rst

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