adding xfail example
adding xfail example

--HG--
branch : trunk

vodik/pytest,mdboom/pytest,oleg-alexandrov/pytest,hpk42/pytest,ojake/pytest,untitaker/pytest,ojake/pytest,bubenkoff/pytest,Bachmann1234/pytest,rouge8/pytest,davidszotten/pytest,untitaker/pytest,etataurov/pytest,skylarjhdownes/pytest,nicoddemus/repo-test,ddboline/pytest,jb098/pytest,ericdill/pytest,doordash/pytest,The-Compiler/pytest,txomon/pytest,icemac/pytest,Haibo-Wang-ORG/pytest,wfxiang08/pytest,pelme/pytest,inirudebwoy/pytest,mhils/pytest,tgoodlet/pytest,eli-b/pytest,Carreau/pytest,takluyver/pytest,nicoddemus/repo-test,abusalimov/pytest,omarkohl/pytest,takluyver/pytest,bukzor/pytest,Haibo-Wang-ORG/pytest,doordash/pytest,userzimmermann/pytest,codewarrior0/pytest,pytest-dev/pytest,Akasurde/pytest,tomviner/pytest,chiller/pytest,markshao/pytest,nicoddemus/pytest,lukas-bednar/pytest,Bjwebb/pytest,inirudebwoy/pytest,rmfitzpatrick/pytest,mhils/pytest,chillbear/pytest,chiller/pytest,Bjwebb/pytest,hpk42/pytest,lukas-bednar/pytest,gabrielcnr/pytest,MichaelAquilina/pytest,ghostsquad/pytest,RonnyPfannschmidt/pytest,wfxiang08/pytest,hackebrot/pytest,icemac/pytest,bubenkoff/pytest,codewarrior0/pytest,malinoff/pytest,chillbear/pytest,mbirtwell/pytest,mbirtwell/pytest,jaraco/pytest,userzimmermann/pytest,JonathonSonesen/pytest,ionelmc/pytest,ericdill/pytest,bukzor/pytest,ghostsquad/pytest,ionelmc/pytest,alfredodeza/pytest,pytest-dev/py,tareqalayan/pytest,hunse/pytest,vodik/pytest,Magicjarvis/py,JonathonSonesen/pytest,pfctdayelise/pytest,The-Compiler/pytest,ropez/pytest,hunse/pytest,Carreau/pytest,MengJueM/pytest,oleg-alexandrov/pytest,omarkohl/pytest,gabrielcnr/pytest,Bachmann1234/pytest,rouge8/pytest,MengJueM/pytest,tomviner/pytest,mdboom/pytest,ropez/pytest,flub/pytest,jb098/pytest,abusalimov/pytest,nicoddemus/pytest,pelme/pytest,vmalloc/dessert