changes as commented

Author: chrispycheng

nibabel/cmdline/diff.py

@@ -164,6 +164,7 @@ def get_data_diff(files, max_abs=0, max_rel=0):
         diffs1 = [None] * (i + 1)
 
         for j, d2 in enumerate(data[i + 1:], i + 1):
+
             abs_diff = np.abs(d1 - d2)
             mean_abs = (np.abs(d1) + np.abs(d2)) * 0.5
             candidates = np.logical_or(mean_abs != 0, abs_diff != 0)
@@ -186,16 +187,20 @@ def get_data_diff(files, max_abs=0, max_rel=0):
                 max_rel_diff = 0
 
             if np.any(candidates):
+
                 diff_rec = OrderedDict()  # so that abs goes before relative
+
                 diff_rec['abs'] = max_abs_diff
                 diff_rec['rel'] = max_rel_diff
                 diffs1.append(diff_rec)
             else:
                 diffs1.append(None)
 
         if any(diffs1):
+
             diffs['DATA(diff %d:)' % (i + 1)] = diffs1
 
+
     return diffs