Add docstring.
Add docstring.

txomon/pytest,omarkohl/pytest,Haibo-Wang-ORG/pytest,Akasurde/pytest,ropez/pytest,mdboom/pytest,Bjwebb/pytest,eli-b/pytest,doordash/pytest,jb098/pytest,ddboline/pytest,ionelmc/pytest,hpk42/pytest,icemac/pytest,mdboom/pytest,ionelmc/pytest,pfctdayelise/pytest,omarkohl/pytest,vmalloc/dessert,markshao/pytest,MengJueM/pytest,Bjwebb/pytest,jb098/pytest,Haibo-Wang-ORG/pytest,hackebrot/pytest,chillbear/pytest,tgoodlet/pytest,chiller/pytest,alfredodeza/pytest,icemac/pytest,malinoff/pytest,tareqalayan/pytest,abusalimov/pytest,nicoddemus/pytest,nicoddemus/pytest,JonathonSonesen/pytest,mhils/pytest,RonnyPfannschmidt/pytest,flub/pytest,mbirtwell/pytest,gabrielcnr/pytest,jaraco/pytest,The-Compiler/pytest,oleg-alexandrov/pytest,JonathonSonesen/pytest,userzimmermann/pytest,pytest-dev/pytest,lukas-bednar/pytest,MichaelAquilina/pytest,mbirtwell/pytest,Bachmann1234/pytest,gabrielcnr/pytest,rouge8/pytest,hpk42/pytest,oleg-alexandrov/pytest,mhils/pytest,tomviner/pytest,skylarjhdownes/pytest,vodik/pytest,davidszotten/pytest,tomviner/pytest,The-Compiler/pytest,MengJueM/pytest,doordash/pytest,ropez/pytest,userzimmermann/pytest,chiller/pytest,bukzor/pytest,bukzor/pytest,vodik/pytest,abusalimov/pytest,Bachmann1234/pytest,chillbear/pytest,lukas-bednar/pytest,rmfitzpatrick/pytest,etataurov/pytest,rouge8/pytest