.coveragerc: use "src" only from current dir
.coveragerc: use "src" only from current dir

This avoids including generated test files with "src" in their path.

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