Add default values documentation for python_files, python_classes and python_functions
Add default values documentation for python_files, python_classes and python_functions

pfctdayelise/pytest,pytest-dev/pytest,The-Compiler/pytest,tomviner/pytest,RonnyPfannschmidt/pytest,nicoddemus/pytest,alfredodeza/pytest,davidszotten/pytest,rmfitzpatrick/pytest,hackebrot/pytest,markshao/pytest,nicoddemus/pytest,tareqalayan/pytest,The-Compiler/pytest,ddboline/pytest,tomviner/pytest,Akasurde/pytest,txomon/pytest