Finish leak doc/tests

[thomcc]

Oops.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 87.26%. Comparing base (47747d5) to head (3c85a3b).

Files	Patch %	Lines
src/arc_str.rs	75.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #58      +/-   ##
==========================================
+ Coverage   82.34%   87.26%   +4.92%     
==========================================
  Files           4        4              
  Lines         487      487              
==========================================
+ Hits          401      425      +24     
+ Misses         86       62      -24     

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