Keep tpattern sample within TR in slice timing test

3dTshift rejects offsets >= TR. The sample list 0.1*i overflowed
TR=2.0s once num_slices > 20.

Author: nx10

tests/integration/functional/test_stc.py

@@ -25,8 +25,8 @@ def test_slice_timing_tpattern_list(test_subject: TestSubjectData) -> None:
     """Test that tpattern accepts a list of slice timing offsets."""
     num_slices = nifti_num_slices(test_subject.bold)
 
-    # sample tpattern based on total slices
-    tpattern = [0.1 * i for i in range(num_slices)]
+    # sample tpattern based on total slices, kept within [0, tr)
+    tpattern = [round(i * 2.0 / num_slices, 4) for i in range(num_slices)]
     corrected = slice_timing_correction(
         in_file=test_subject.bold, tr=2.0, tpattern=tpattern
     )