Log Message:
py-coverage: updated to 7.6.8

Version 7.6.8 — 2024-11-23

- Fix: the LCOV report code assumed that a branch line that took no branches
  meant that the entire line was unexecuted.  This isn't true in a few cases:
  the line might always raise an exception, or might have been optimized away.
  Fixes `issue 1896`_.

- Fix: similarly, the HTML report will now explain that a line that jumps to
  none of its expected destinations must have always raised an exception.
  Previously, it would say something nonsensical like, "line 4 didn't jump to
  line 5 because line 4 was never true, and it didn't jump to line 7 because
  line 4 was always true."  This was also shown in `issue 1896`_.