def get_missing_arc_description(self, cov: Coverage, start: TLineNo, end: TLineNo) -> str:
        """Get the missing-arc description for a line arc in a coverage run."""
        # ugh, unexposed methods??
        assert self.last_module_name is not None
        filename = self.last_module_name + ".py"
        fr = cov._get_file_reporter(filename)
        arcs_executed = cov._analyze(filename).arcs_executed
        return fr.missing_arc_description(start, end, arcs_executed)
Get the missing-arc description for a line arc in a coverage run.
tests/coveragetest.py