rustkas
Property-Based Testing with PropEr, Erlang, and Elixir: Unexpected appearance of a line of text in program code (page 147)
At the top of the page in the code section Erlang there is a line of text:
existing code
It is clear that the author meant that the existing code should be in this place. I think, it would be better for readers if this line of text began with a comment mark %.
Something like that:
% existing code is here
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