minor: clarify help with reportchars (#5475)
minor: clarify help with reportchars (#5475)

minor: clarify help with reportchars
tomviner/pytest,The-Compiler/pytest,nicoddemus/pytest,alfredodeza/pytest,markshao/pytest,The-Compiler/pytest,RonnyPfannschmidt/pytest,Akasurde/pytest,tomviner/pytest,nicoddemus/pytest,pytest-dev/pytest