Traceback (most recent call last):
  File "/opt/chainguard/palaso/bin/concordance", line 19, in <module>
    from palaso.sfm import usfm, style
  File "/opt/chainguard/palaso/lib/python3.13/site-packages/palaso/sfm/__init__.py", line 260, in <module>
    class _put_back_iter(collections.Iterator):
                         ^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'collections' has no attribute 'Iterator'