readline generator no longer needs to yield empty strings
readline generator no longer needs to yield empty strings

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