message: Slightly expand margin for testing sleep, to account for OS X
diff: @@ -242,7 +242,7 @@ TEST_CASE("Test OS-specific functions", "[osspecific]")
  CHECK(milliseconds1 < 1.0);
  CHECK(milliseconds2 > 1480.0);
  - CHECK(milliseconds2 < 1650.0);
  + CHECK(milliseconds2 < 1675.0);
  }
  // timestamp as of the creation of this test
  