Tell coveragepy to ignore type checking code and ...

This is so we can get a more accurate picture of coverage.

For more info see:
- nedbat/coveragepy#831

setup.cfg

@@ -16,6 +16,12 @@ exclude_lines =
     # Have to re-enable the standard pragma
     pragma: no cover
 
+    # TYPE_CHECKING guarded code only affects type checkers.
+    ^ +if (False|TYPE_CHECKING):
+    # constant used in protocols and abstract methods, does not run anything
+    # and has no side effects.
+    ^ +\.\.\.$
+
     # Don't complain if non-runnable code isn't run:
     if 0:
     if __name__ == .__main__.: