Restore proper handling of '%' in assertion messages
Restore proper handling of '%' in assertion messages

The-Compiler/pytest,alfredodeza/pytest,pytest-dev/pytest,nicoddemus/pytest,tomviner/pytest,Akasurde/pytest,RonnyPfannschmidt/pytest,The-Compiler/pytest,tomviner/pytest,nicoddemus/pytest,markshao/pytest