message: Use abs value in the unit test check.
diff: @@ -100,7 +100,7 @@ TEST_CASE("conv")
  << " conforming: " << imesh
  << " order: " << order
  << ", pa error norm: " << pa_error << std::endl;
  - REQUIRE(pa_error < 1.e-12);
  + REQUIRE(fabs(pa_error) < 1.e-12);
  }//order loop
  }//mesh loop
  }//dimension loop
  