bugdown: Fix type annotations.
bugdown: Fix type annotations.

In some functions the first parameter was wrongly annotated as
`markdown.Markdown`. Change that to `text_type`.

tommyip/zulip,dattatreya303/zulip,reyha/zulip,shubhamdhama/zulip,AZtheAsian/zulip,paxapy/zulip,timabbott/zulip,sonali0901/zulip,synicalsyntax/zulip,Juanvulcano/zulip,AZtheAsian/zulip,showell/zulip,christi3k/zulip,mahim97/zulip,sup95/zulip,reyha/zulip,niftynei/zulip,rishig/zulip,souravbadami/zulip,samatdav/zulip,rht/zulip,brockwhittaker/zulip,arpith/zulip,grave-w-grave/zulip,rht/zulip,vaidap/zulip,sharmaeklavya2/zulip,Galexrt/zulip,jphilipsen05/zulip,AZtheAsian/zulip,eeshangarg/zulip,brockwhittaker/zulip,eeshangarg/zulip,vikas-parashar/zulip,sonali0901/zulip,SmartPeople/zulip,synicalsyntax/zulip,PhilSk/zulip,jrowan/zulip,rishig/zulip,punchagan/zulip,hackerkid/zulip,zacps/zulip,mohsenSy/zulip,dawran6/zulip,sup95/zulip,PhilSk/zulip,KingxBanana/zulip,calvinleenyc/zulip,vikas-parashar/zulip,punchagan/zulip,jainayush975/zulip,cosmicAsymmetry/zulip,dattatreya303/zulip,susansls/zulip,andersk/zulip,cosmicAsymmetry/zulip,vaidap/zulip,brainwane/zulip,umkay/zulip,blaze225/zulip,dawran6/zulip,blaze225/zulip,mahim97/zulip,rishig/zulip,kou/zulip,rht/zulip,showell/zulip,tommyip/zulip,amyliu345/zulip,mohsenSy/zulip,amanharitsh123/zulip,timabbott/zulip,sharmaeklavya2/zulip,cosmicAsymmetry/zulip,shubhamdhama/zulip,jackrzhang/zulip,KingxBanana/zulip,isht3/zulip,eeshangarg/zulip,niftynei/zulip,arpith/zulip,synicalsyntax/zulip,rishig/zulip,mohsenSy/zulip,hackerkid/zulip,jphilipsen05/zulip,vaidap/zulip,jainayush975/zulip,KingxBanana/zulip,timabbott/zulip,peguin40/zulip,andersk/zulip,Jianchun1/zulip,Galexrt/zulip,PhilSk/zulip,dattatreya303/zulip,kou/zulip,dhcrzf/zulip,vikas-parashar/zulip,aakash-cr7/zulip,shubhamdhama/zulip,timabbott/zulip,verma-varsha/zulip,PhilSk/zulip,timabbott/zulip,brockwhittaker/zulip,niftynei/zulip,jrowan/zulip,sonali0901/zulip,amyliu345/zulip,souravbadami/zulip,showell/zulip,rht/zulip,ryanbackman/zulip,hackerkid/zulip,ryanbackman/zulip,KingxBanana/zulip,synicalsyntax/zulip,JPJPJPOPOP/zulip,Juanvulcano/zulip,shubhamdhama/zulip,zacps/zulip,umkay/zulip,souravbadami/zulip,isht3/zulip,aakash-cr7/zulip,niftynei/zulip,dawran6/zulip,jphilipsen05/zulip,ryanbackman/zulip,cosmicAsymmetry/zulip,peguin40/zulip,joyhchen/zulip,dattatreya303/zulip,Juanvulcano/zulip,amanharitsh123/zulip,rishig/zulip,kou/zulip,brockwhittaker/zulip,punchagan/zulip,grave-w-grave/zulip,hackerkid/zulip,dawran6/zulip,paxapy/zulip,vaidap/zulip,Jianchun1/zulip,JPJPJPOPOP/zulip,brockwhittaker/zulip,niftynei/zulip,sharmaeklavya2/zulip,SmartPeople/zulip,blaze225/zulip,Galexrt/zulip,andersk/zulip,vikas-parashar/zulip,susansls/zulip,rht/zulip,umkay/zulip,dhcrzf/zulip,hackerkid/zulip,dawran6/zulip,Galexrt/zulip,tommyip/zulip,SmartPeople/zulip,isht3/zulip,zulip/zulip,samatdav/zulip,grave-w-grave/zulip,joyhchen/zulip,mahim97/zulip,zacps/zulip,isht3/zulip,hackerkid/zulip,sharmaeklavya2/zulip,sup95/zulip,rishig/zulip,umkay/zulip,j831/zulip,shubhamdhama/zulip,sharmaeklavya2/zulip,sonali0901/zulip,Juanvulcano/zulip,arpith/zulip,zulip/zulip,souravbadami/zulip,AZtheAsian/zulip,JPJPJPOPOP/zulip,zacps/zulip,dhcrzf/zulip,christi3k/zulip,tommyip/zulip,samatdav/zulip,joyhchen/zulip,amyliu345/zulip,reyha/zulip,arpith/zulip,jrowan/zulip,kou/zulip,joyhchen/zulip,TigorC/zulip,brainwane/zulip,AZtheAsian/zulip,blaze225/zulip,andersk/zulip,eeshangarg/zulip,paxapy/zulip,christi3k/zulip,christi3k/zulip,calvinleenyc/zulip,umkay/zulip,vabs22/zulip,kou/zulip,synicalsyntax/zulip,zulip/zulip,Juanvulcano/zulip,sonali0901/zulip,paxapy/zulip,PhilSk/zulip,peguin40/zulip,Diptanshu8/zulip,jainayush975/zulip,Jianchun1/zulip,kou/zulip,synicalsyntax/zulip,isht3/zulip,zulip/zulip,Diptanshu8/zulip,showell/zulip,amyliu345/zulip,grave-w-grave/zulip,calvinleenyc/zulip,TigorC/zulip,brockwhittaker/zulip,eeshangarg/zulip,isht3/zulip,punchagan/zulip,JPJPJPOPOP/zulip,jrowan/zulip,peguin40/zulip,andersk/zulip,JPJPJPOPOP/zulip,paxapy/zulip,j831/zulip,JPJPJPOPOP/zulip,punchagan/zulip,jrowan/zulip,christi3k/zulip,Diptanshu8/zulip,Jianchun1/zulip,grave-w-grave/zulip,aakash-cr7/zulip,hackerkid/zulip,amanharitsh123/zulip,kou/zulip,mahim97/zulip,j831/zulip,Jianchun1/zulip,eeshangarg/zulip,sup95/zulip,jphilipsen05/zulip,shubhamdhama/zulip,vabs22/zulip,verma-varsha/zulip,j831/zulip,SmartPeople/zulip,tommyip/zulip,susansls/zulip,showell/zulip,amyliu345/zulip,amanharitsh123/zulip,cosmicAsymmetry/zulip,amanharitsh123/zulip,brainwane/zulip,rht/zulip,susansls/zulip,brainwane/zulip,zulip/zulip,jackrzhang/zulip,jainayush975/zulip,tommyip/zulip,aakash-cr7/zulip,jainayush975/zulip,vaidap/zulip,verma-varsha/zulip,Juanvulcano/zulip,vikas-parashar/zulip,souravbadami/zulip,ryanbackman/zulip,susansls/zulip,rishig/zulip,samatdav/zulip,TigorC/zulip,j831/zulip,umkay/zulip,joyhchen/zulip,punchagan/zulip,rht/zulip,jainayush975/zulip,jackrzhang/zulip,tommyip/zulip,andersk/zulip,sonali0901/zulip,shubhamdhama/zulip,vabs22/zulip,aakash-cr7/zulip,synicalsyntax/zulip,TigorC/zulip,brainwane/zulip,souravbadami/zulip,reyha/zulip,umkay/zulip,andersk/zulip,dattatreya303/zulip,timabbott/zulip,timabbott/zulip,mahim97/zulip,christi3k/zulip,paxapy/zulip,grave-w-grave/zulip,dhcrzf/zulip,SmartPeople/zulip,Galexrt/zulip,dhcrzf/zulip,jrowan/zulip,niftynei/zulip,sup95/zulip,verma-varsha/zulip,jphilipsen05/zulip,j831/zulip,calvinleenyc/zulip,reyha/zulip,cosmicAsymmetry/zulip,brainwane/zulip,ryanbackman/zulip,Diptanshu8/zulip,vaidap/zulip,KingxBanana/zulip,blaze225/zulip,AZtheAsian/zulip,mohsenSy/zulip,jackrzhang/zulip,dhcrzf/zulip,susansls/zulip,dawran6/zulip,vabs22/zulip,mohsenSy/zulip,verma-varsha/zulip,zulip/zulip,Diptanshu8/zulip,jackrzhang/zulip,brainwane/zulip,mahim97/zulip,aakash-cr7/zulip,Diptanshu8/zulip,zulip/zulip,mohsenSy/zulip,Galexrt/zulip,sharmaeklavya2/zulip,verma-varsha/zulip,Galexrt/zulip,ryanbackman/zulip,TigorC/zulip,blaze225/zulip,KingxBanana/zulip,vabs22/zulip,showell/zulip,zacps/zulip,arpith/zulip,reyha/zulip,Jianchun1/zulip,vabs22/zulip,samatdav/zulip,arpith/zulip,amanharitsh123/zulip,calvinleenyc/zulip,joyhchen/zulip,PhilSk/zulip,peguin40/zulip,punchagan/zulip,peguin40/zulip,SmartPeople/zulip,dattatreya303/zulip,jackrzhang/zulip,dhcrzf/zulip,showell/zulip,samatdav/zulip,vikas-parashar/zulip,sup95/zulip,jphilipsen05/zulip,jackrzhang/zulip,amyliu345/zulip,calvinleenyc/zulip,eeshangarg/zulip,zacps/zulip,TigorC/zulip