Expect 2D test to fail.

Author: James Crake-Merani

test/utest_temp_ascii_reader.py

@@ -81,6 +81,9 @@ def test_ascii_2():
                 assert datum.value[-1] == pytest.approx(1.05918)
 
 
+@pytest.mark.xfail(
+    reason="Guesses for 2D ASCII files are currently wrong, so the data loaded won't be correct."
+)
 def test_ascii_2d():
     filename = find("detector_rectangular.DAT", "sasdataloader")
     # Make sure that the dataset type is guessed as 2D data.