BF: Fix error message

[DimitriPapadopoulos]

No description provided.

[codecov]

Codecov Report

Base: 91.84% // Head: 91.81% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (44da8ae) compared to base (0bb649e).
Patch coverage: 0.00% of modified lines in pull request are covered.

❗ Current head 44da8ae differs from pull request most recent head efb8ce9. Consider uploading reports for the commit efb8ce9 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1156      +/-   ##
==========================================
- Coverage   91.84%   91.81%   -0.03%     
==========================================
  Files         101      101              
  Lines       12447    12463      +16     
  Branches     2237     2238       +1     
==========================================
+ Hits        11432    11443      +11     
- Misses        688      693       +5     
  Partials      327      327              

Impacted Files	Coverage Δ
nibabel/ecat.py	88.07% <0.00%> (ø)
nibabel/cmdline/dicomfs.py	18.96% <0.00%> (-0.45%)	⬇️
nibabel/streamlines/tck.py	99.49% <0.00%> (+<0.01%)	⬆️
nibabel/wrapstruct.py	97.01% <0.00%> (+0.02%)	⬆️
nibabel/dft.py	81.34% <0.00%> (+0.21%)	⬆️

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[effigies]

Looks like it didn't raise any alarms in https://github.com/nipy/nibabel/actions/runs/3707291213/jobs/6283525379. Thanks!