Fixup collections

[MarcoGorelli]

No description provided.

[codecov]

Codecov Report

Merging #19 (98fc41f) into main (88cacf8) will increase coverage by 0.45%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   85.58%   86.04%   +0.45%     
==========================================
  Files          26       26              
  Lines         340      344       +4     
==========================================
+ Hits          291      296       +5     
+ Misses         49       48       -1     

Impacted Files	Coverage Δ
...v_flaker/_plugins_tokens/strings_to_concatenate.py	90.00% <100.00%> (ø)
pandas_dev_flaker/_plugins_tree/collections_abc.py	100.00% <100.00%> (+12.50%)	⬆️

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