docs(dialog): fix sample code
docs(dialog): fix sample code

Thank @ertrzyiks
Closes #468

davidecavaliere/material,pijey/material,dlochrie/material,loic/material,bendroid/material,vertazzar/material,pan-long/material,mprentic-harris/material,keshavos/material,j3ski/material,FrankMeyer/material,paulflo150/material,asonni/material,amithub/Angular-Material-Web-Design,nantunes/material,vanslly/material,kennethcachia/material,jelbourn/material,Splaktar/material,wmehanna/material,NickBolles/material,cdriscol/material,philipooo/material,FrankMeyer/material,pan-long/material,pwistbac/material,mightyselva/material,jeremymwells/material,ErinCoughlan/material,2947721120/angular-material,dlochrie/material,sandeeppatidar/material,hesling/material,aanjna/material,quietshu/material,Bhavinshah5111/material,graingert/material,Chuck8080/materialdesign-angular,Frank3K/material,jeremymwells/material,brian-lewis/material,BernhardRode/material,acoreyj/material,DevVersion/material,dlochrie/material,marekmicek/material,Teremok/material,Splaktar/material,BurovAndrii/material,veraksar/material,Sravyaksr/material,hodeyp/material,andreialecu/material,m0g/material,welkinhealth/material,angularjscl/material,n1vlac/material,mattiLeBlanc/material,brunoqc/material,IRlyDontKnow/material,jeremymwells/material,hannahhoward/material,Patrik-Lundqvist/material,dreamoftrees/material,kennethcachia/material,ashwathgovind/material,mightyselva/material,veraksar/material,listenlee/material,Bhavinshah5111/material,Igosuki/material,DevVersion/material,cdriscol/material,miguelcobain/material,victorivens05/material,BurovAndrii/material,cdriscol/material,johanvo18/material,izeau/material,arush/material,Antariano/material,EladBezalel/material,hesling/material,2947721120/angular-material,crisbeto/material,dalong123/material,deerawan/material,wisavalite/material,wanmifam/material,robteix/material,n1vlac/material,bluebirdtech/material,uistyleguide/uistyleguide.github.io,tarnas14/material,onumossn/material,vertazzar/material,paulflo150/material,marduke182/material,vurt/material,imjoeco/material,hannahhoward/material,tolysz/material,rassokhina/material,Splaktar/material,bjfletcher/material,IRlyDontKnow/material,Jeremy017/material,graingert/material,yangjae/material,rassokhina/material,Splaktar/material,theZimmee/angular-material,ryancampbell/material,listenlee/material,JayQuerido/material,EladBezalel/material,kamilkisiela/material,wmehanna/material,colinskow/material,franzsilva/material,david-gang/material,drrezeau/material,sandeeppatidar/material,JayQuerido/material,jeremymwells/material,wanmifam/material,dmitriz/material,matthewrfindley/material,gkalpak/material,java02014/material-1,abhijitsinha89/material,xiexingen/material,ilovezy/material,miladhamzelou/material,eloytoro/material,aikalima/material,philipooo/material,tolysz/material,onumossn/material,franzsilva/material,rolandoldengarm/material,Teremok/material,1012/material,richtmat/material,iksose/material,udhayam/material,oostmeijer/material,pwistbac/material,JonFerrera/material,Sravyaksr/material,bendroid/material,alfirin/material,gmoothart/material,bluebirdtech/material,antoniosejas/material,wmehanna/material,antoniosejas/material,SanderElias/material,ardas/material,taranjeetsapra/material,clshortfuse/material,daniel-nagy/material,isaaclyman/material,mprentic-harris/material,sscovil/material,barryvdh/material,marekmicek/material,dalong123/material,zhhb/material,colinskow/material,zhhb/material,gkalpak/material,willgum/material_03,weebygames/material,franzsilva/material,daniel-nagy/material,aikalima/material,asonni/material,ilovett/material,mikol/angular-material,jianwang195823/material,dlochrie/material,gabimanea/material,miaotmac/material,crisbeto/material,57-Wolve/material,Teremok/material,tarnas14/material,isaaclyman/material,hiddestokvis/material,mikol/angular-material,epelc/material,justingrayston/material,miaotmac/material,ilovett/material,stephen-james/material,lukascivil/material,uistyleguide/uistyleguide.github.io,ilovezy/material,deerawan/material,marpontes/material,rassokhina/material,daniel-nagy/material,Kielan/material,m0g/material,profoundry-us/material,pan-long/material,stephen-james/material,rschmukler/material,hitesh97/material,robertmesserle/material,hiddestokvis/material,wisavalite/material,justingrayston/material,marekmicek/material,Drooids/material,dreamoftrees/material,vertazzar/material,amithub/Angular-Material-Web-Design,FrankMeyer/material,matthewrfindley/material,dreamoftrees/material,listenlee/material,listenlee/material,Belicosus/material,Mexiswow/material,jelbourn/material,quietshu/material,shyndman/material,acoreyj/material,graingert/material,2947721120/angular-material,Todd-Werelius/material,xale/material,Benew/material,p5150j/material,iksose/material,angular/material,lukascivil/material,programmist/material,miaotmac/material,shyndman/material,kwypchlo/material,victorivens05/material,willgum/material_03,DerekLouie/material,nkoterba/material,DerekLouie/material,barryvdh/material,quietshu/material,mattiLeBlanc/material,SanderElias/material,izeau/material,noamsheme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