test_gs2_diagnostics_new has errors but reports as passing

The test has some errors:
‌
Running     : test_gs2_diagnostics_new  
Running     : test_gs2_diagnostics_new  
ValueError: could not convert string to float: 't='
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/builds/gyrokinetics/gs2/tests/unit_tests/gs2_diagnostics_new/./compare_ascii.py", line 12, in <module>
    var1 = np.loadtxt(args.file1)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 1356, in loadtxt
    arr = _read(fname, dtype=dtype, comment=comment, delimiter=delimiter,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 999, in _read
    arr = _load_from_filelike(
          ^^^^^^^^^^^^^^^^^^^^
ValueError: could not convert string 't=' to float64 at row 0, column 1.
/builds/gyrokinetics/gs2/tests/unit_tests/gs2_diagnostics_new/./compare_ascii.py:12: UserWarning: loadtxt: input contained no data: "old_diagnostics/test_gs2_diagnostics_new.jext"
  var1 = np.loadtxt(args.file1)
Traceback (most recent call last):
  File "/builds/gyrokinetics/gs2/tests/unit_tests/gs2_diagnostics_new/./compare_ascii.py", line 13, in <module>
    var2 = np.loadtxt(args.file2)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 1356, in loadtxt
    arr = _read(fname, dtype=dtype, comment=comment, delimiter=delimiter,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 975, in _read
    fh = np.lib._datasource.open(fname, 'rt', encoding=encoding)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/_datasource.py", line 193, in open
    return ds.open(path, mode, encoding=encoding, newline=newline)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/_datasource.py", line 533, in open
    raise FileNotFoundError(f"{path} not found.")
FileNotFoundError: test_gs2_diagnostics_new.jext not found.
Traceback (most recent call last):
  File "/builds/gyrokinetics/gs2/tests/unit_tests/gs2_diagnostics_new/./compare_ascii.py", line 12, in <module>
    var1 = np.loadtxt(args.file1)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 1356, in loadtxt
    arr = _read(fname, dtype=dtype, comment=comment, delimiter=delimiter,
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib64/python3.11/site-packages/numpy/lib/npyio.py", line 999, in _read
    arr = _load_from_filelike(
          ^^^^^^^^^^^^^^^^^^^^
ValueError: the number of columns changed from 19 to 18 at row 2; use `usecols` to select a subset and avoid this error
but reports as passing
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