Change _showfixtures_main to loop over fixturedefs
Change _showfixtures_main to loop over fixturedefs

userzimmermann/pytest,pfctdayelise/pytest,The-Compiler/pytest,Akasurde/pytest,malinoff/pytest,tareqalayan/pytest,tgoodlet/pytest,ddboline/pytest,etataurov/pytest,userzimmermann/pytest,davidszotten/pytest,JonathonSonesen/pytest,nicoddemus/pytest,flub/pytest,eli-b/pytest,jaraco/pytest,vmalloc/dessert,RonnyPfannschmidt/pytest,hackebrot/pytest,MichaelAquilina/pytest,The-Compiler/pytest,alfredodeza/pytest,JonathonSonesen/pytest,hpk42/pytest,hpk42/pytest,tomviner/pytest,pytest-dev/pytest,skylarjhdownes/pytest,txomon/pytest,nicoddemus/pytest,markshao/pytest,tomviner/pytest,rmfitzpatrick/pytest